/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:29:54,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:29:54,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:29:54,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:29:55,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 19:29:55,057 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:29:55,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:29:55,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:29:55,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:29:55,058 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:29:55,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:29:55,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:29:55,059 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:29:55,059 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:29:55,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:29:55,060 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:29:55,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:29:55,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:29:55,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:29:55,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:29:55,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:29:55,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:29:55,061 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:29:55,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:29:55,061 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:29:55,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:29:55,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:29:55,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:29:55,061 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:29:55,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:29:55,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:29:55,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:29:55,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:29:55,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:29:55,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:29:55,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:29:55,062 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:29:55,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:29:55,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:29:55,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:29:55,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:29:55,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:29:55,261 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:29:55,261 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:29:55,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl [2022-03-03 19:29:55,263 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl' [2022-03-03 19:29:55,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:29:55,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:29:55,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:29:55,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:29:55,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:29:55,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:29:55" (1/1) ... [2022-03-03 19:29:55,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:29:55" (1/1) ... [2022-03-03 19:29:55,298 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:29:55,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:29:55,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:29:55,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:29:55,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:29:55,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:29:55" (1/1) ... [2022-03-03 19:29:55,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:29:55" (1/1) ... [2022-03-03 19:29:55,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:29:55" (1/1) ... [2022-03-03 19:29:55,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:29:55" (1/1) ... [2022-03-03 19:29:55,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:29:55" (1/1) ... [2022-03-03 19:29:55,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:29:55" (1/1) ... [2022-03-03 19:29:55,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:29:55" (1/1) ... [2022-03-03 19:29:55,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:29:55,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:29:55,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:29:55,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:29:55,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:29:55" (1/1) ... [2022-03-03 19:29:55,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:29:55,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:29:55,339 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 19:29:55,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 19:29:55,377 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:29:55,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:29:55,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:29:55,378 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:29:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:29:55,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:29:55,378 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:29:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:29:55,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:29:55,378 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:29:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:29:55,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:29:55,379 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:29:55,409 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:29:55,410 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:29:55,466 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:29:55,476 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:29:55,476 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:29:55,477 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:29:55 BoogieIcfgContainer [2022-03-03 19:29:55,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:29:55,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:29:55,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:29:55,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:29:55,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:29:55" (1/2) ... [2022-03-03 19:29:55,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3319a9 and model type mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:29:55, skipping insertion in model container [2022-03-03 19:29:55,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:29:55" (2/2) ... [2022-03-03 19:29:55,487 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-equiv.wvr.bpl [2022-03-03 19:29:55,490 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:29:55,490 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:29:55,490 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:29:55,490 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:29:55,520 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 19:29:55,547 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:29:55,551 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:29:55,552 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 19:29:55,558 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2022-03-03 19:29:55,587 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 19:29:55,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:55,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:55,597 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:29:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:55,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1698272252, now seen corresponding path program 1 times [2022-03-03 19:29:55,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:55,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739865962] [2022-03-03 19:29:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:55,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:55,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:55,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739865962] [2022-03-03 19:29:55,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739865962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:29:55,723 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:29:55,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:29:55,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552668161] [2022-03-03 19:29:55,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:29:55,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:29:55,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:29:55,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:29:55,755 INFO L87 Difference]: Start difference. First operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:55,804 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2022-03-03 19:29:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:29:55,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 19:29:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:55,822 INFO L225 Difference]: With dead ends: 214 [2022-03-03 19:29:55,822 INFO L226 Difference]: Without dead ends: 199 [2022-03-03 19:29:55,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:29:55,827 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:55,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:29:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-03 19:29:55,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2022-03-03 19:29:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:55,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2022-03-03 19:29:55,918 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2022-03-03 19:29:55,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:55,919 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2022-03-03 19:29:55,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:55,919 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2022-03-03 19:29:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 19:29:55,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:55,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:55,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:29:55,924 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:29:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:55,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1717701342, now seen corresponding path program 1 times [2022-03-03 19:29:55,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:55,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242208184] [2022-03-03 19:29:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:55,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:56,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:56,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242208184] [2022-03-03 19:29:56,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242208184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:56,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666720809] [2022-03-03 19:29:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:56,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:56,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:29:56,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:29:56,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:29:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:56,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:29:56,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:29:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:56,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:29:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:56,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666720809] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:56,231 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 19:29:56,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 7 [2022-03-03 19:29:56,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873243587] [2022-03-03 19:29:56,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:29:56,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:29:56,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:56,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:29:56,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:29:56,233 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:56,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:56,300 INFO L93 Difference]: Finished difference Result 284 states and 788 transitions. [2022-03-03 19:29:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:29:56,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 19:29:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:56,302 INFO L225 Difference]: With dead ends: 284 [2022-03-03 19:29:56,302 INFO L226 Difference]: Without dead ends: 284 [2022-03-03 19:29:56,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:29:56,304 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:56,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:29:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-03 19:29:56,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 176. [2022-03-03 19:29:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 3.0114285714285716) internal successors, (527), 175 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 527 transitions. [2022-03-03 19:29:56,319 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 527 transitions. Word has length 17 [2022-03-03 19:29:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:56,319 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 527 transitions. [2022-03-03 19:29:56,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 527 transitions. [2022-03-03 19:29:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 19:29:56,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:56,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:56,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:29:56,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:56,524 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:29:56,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:56,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1520327836, now seen corresponding path program 1 times [2022-03-03 19:29:56,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:56,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500584690] [2022-03-03 19:29:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:56,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:56,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:56,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500584690] [2022-03-03 19:29:56,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500584690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:29:56,582 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:29:56,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:29:56,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227487044] [2022-03-03 19:29:56,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:29:56,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:29:56,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:56,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:29:56,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:29:56,583 INFO L87 Difference]: Start difference. First operand 176 states and 527 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:56,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:56,633 INFO L93 Difference]: Finished difference Result 240 states and 691 transitions. [2022-03-03 19:29:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:29:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 19:29:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:56,635 INFO L225 Difference]: With dead ends: 240 [2022-03-03 19:29:56,635 INFO L226 Difference]: Without dead ends: 240 [2022-03-03 19:29:56,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:29:56,636 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:56,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:29:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-03 19:29:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 191. [2022-03-03 19:29:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.0) internal successors, (570), 190 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 570 transitions. [2022-03-03 19:29:56,660 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 570 transitions. Word has length 17 [2022-03-03 19:29:56,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:56,661 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 570 transitions. [2022-03-03 19:29:56,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:56,661 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 570 transitions. [2022-03-03 19:29:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 19:29:56,662 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:56,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:56,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:29:56,663 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:29:56,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:56,663 INFO L85 PathProgramCache]: Analyzing trace with hash 721287832, now seen corresponding path program 2 times [2022-03-03 19:29:56,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:56,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373235525] [2022-03-03 19:29:56,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:56,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:56,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:56,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373235525] [2022-03-03 19:29:56,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373235525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:29:56,705 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:29:56,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:29:56,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692334869] [2022-03-03 19:29:56,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:29:56,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:29:56,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:29:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:29:56,706 INFO L87 Difference]: Start difference. First operand 191 states and 570 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:56,757 INFO L93 Difference]: Finished difference Result 312 states and 867 transitions. [2022-03-03 19:29:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:29:56,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 19:29:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:56,768 INFO L225 Difference]: With dead ends: 312 [2022-03-03 19:29:56,768 INFO L226 Difference]: Without dead ends: 312 [2022-03-03 19:29:56,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:29:56,769 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:56,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 27 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:29:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-03 19:29:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2022-03-03 19:29:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.9763313609467454) internal successors, (503), 169 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 503 transitions. [2022-03-03 19:29:56,796 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 503 transitions. Word has length 17 [2022-03-03 19:29:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:56,797 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 503 transitions. [2022-03-03 19:29:56,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 503 transitions. [2022-03-03 19:29:56,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 19:29:56,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:56,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:56,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-03 19:29:56,798 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:29:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:56,799 INFO L85 PathProgramCache]: Analyzing trace with hash 388922714, now seen corresponding path program 1 times [2022-03-03 19:29:56,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:56,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459260847] [2022-03-03 19:29:56,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:56,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:56,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:56,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459260847] [2022-03-03 19:29:56,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459260847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:29:56,834 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:29:56,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:29:56,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959672619] [2022-03-03 19:29:56,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:29:56,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:29:56,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:56,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:29:56,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:29:56,835 INFO L87 Difference]: Start difference. First operand 170 states and 503 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:56,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:56,895 INFO L93 Difference]: Finished difference Result 192 states and 530 transitions. [2022-03-03 19:29:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:29:56,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 19:29:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:56,898 INFO L225 Difference]: With dead ends: 192 [2022-03-03 19:29:56,898 INFO L226 Difference]: Without dead ends: 162 [2022-03-03 19:29:56,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:29:56,900 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:56,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:29:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-03 19:29:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2022-03-03 19:29:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.9324324324324325) internal successors, (434), 148 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 434 transitions. [2022-03-03 19:29:56,910 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 434 transitions. Word has length 17 [2022-03-03 19:29:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:56,910 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 434 transitions. [2022-03-03 19:29:56,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 434 transitions. [2022-03-03 19:29:56,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 19:29:56,912 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:56,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:56,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 19:29:56,912 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:29:56,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:56,912 INFO L85 PathProgramCache]: Analyzing trace with hash 336279062, now seen corresponding path program 2 times [2022-03-03 19:29:56,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:56,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435559224] [2022-03-03 19:29:56,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:56,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:56,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:56,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435559224] [2022-03-03 19:29:56,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435559224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:56,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529806332] [2022-03-03 19:29:56,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:29:56,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:56,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:29:56,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:29:56,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:29:56,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:29:56,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:29:56,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:29:56,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:29:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:57,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:29:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:57,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529806332] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:57,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 19:29:57,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-03-03 19:29:57,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247500163] [2022-03-03 19:29:57,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:29:57,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:29:57,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:57,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:29:57,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:29:57,077 INFO L87 Difference]: Start difference. First operand 149 states and 434 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:57,112 INFO L93 Difference]: Finished difference Result 245 states and 688 transitions. [2022-03-03 19:29:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:29:57,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 19:29:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:57,114 INFO L225 Difference]: With dead ends: 245 [2022-03-03 19:29:57,114 INFO L226 Difference]: Without dead ends: 245 [2022-03-03 19:29:57,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:29:57,114 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:57,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 22 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:29:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-03 19:29:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 161. [2022-03-03 19:29:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.9375) internal successors, (470), 160 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 470 transitions. [2022-03-03 19:29:57,120 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 470 transitions. Word has length 17 [2022-03-03 19:29:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:57,120 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 470 transitions. [2022-03-03 19:29:57,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 470 transitions. [2022-03-03 19:29:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:29:57,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:57,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:57,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:29:57,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-03 19:29:57,336 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:29:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1880409020, now seen corresponding path program 1 times [2022-03-03 19:29:57,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:57,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746408465] [2022-03-03 19:29:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:57,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:57,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:57,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746408465] [2022-03-03 19:29:57,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746408465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:57,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108941137] [2022-03-03 19:29:57,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:57,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:57,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:29:57,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:29:57,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:29:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:57,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:29:57,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:29:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:57,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:29:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:57,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108941137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:29:57,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:29:57,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-03-03 19:29:57,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959236506] [2022-03-03 19:29:57,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:29:57,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 19:29:57,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:57,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 19:29:57,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:29:57,497 INFO L87 Difference]: Start difference. First operand 161 states and 470 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:57,626 INFO L93 Difference]: Finished difference Result 404 states and 1123 transitions. [2022-03-03 19:29:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:29:57,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:29:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:57,628 INFO L225 Difference]: With dead ends: 404 [2022-03-03 19:29:57,629 INFO L226 Difference]: Without dead ends: 404 [2022-03-03 19:29:57,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:29:57,631 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:57,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 70 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:29:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-03-03 19:29:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 234. [2022-03-03 19:29:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.9871244635193133) internal successors, (696), 233 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 696 transitions. [2022-03-03 19:29:57,641 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 696 transitions. Word has length 19 [2022-03-03 19:29:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:57,641 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 696 transitions. [2022-03-03 19:29:57,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 696 transitions. [2022-03-03 19:29:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:29:57,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:57,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:57,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:29:57,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:57,855 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:29:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash 34046910, now seen corresponding path program 1 times [2022-03-03 19:29:57,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:57,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765219454] [2022-03-03 19:29:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:57,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:57,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:57,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765219454] [2022-03-03 19:29:57,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765219454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:57,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131822095] [2022-03-03 19:29:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:57,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:29:57,947 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:29:57,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:29:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:57,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:29:57,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:29:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:29:58,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:29:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:29:58,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131822095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:29:58,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:29:58,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-03 19:29:58,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273410341] [2022-03-03 19:29:58,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:29:58,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:29:58,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:29:58,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:29:58,152 INFO L87 Difference]: Start difference. First operand 234 states and 696 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:58,252 INFO L93 Difference]: Finished difference Result 445 states and 1311 transitions. [2022-03-03 19:29:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:29:58,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:29:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:58,254 INFO L225 Difference]: With dead ends: 445 [2022-03-03 19:29:58,254 INFO L226 Difference]: Without dead ends: 412 [2022-03-03 19:29:58,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:29:58,255 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:58,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 158 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:29:58,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-03-03 19:29:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 328. [2022-03-03 19:29:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.0611620795107033) internal successors, (1001), 327 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1001 transitions. [2022-03-03 19:29:58,263 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1001 transitions. Word has length 19 [2022-03-03 19:29:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:58,263 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 1001 transitions. [2022-03-03 19:29:58,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1001 transitions. [2022-03-03 19:29:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:29:58,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:58,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:58,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:29:58,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:58,471 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:29:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash -846392150, now seen corresponding path program 2 times [2022-03-03 19:29:58,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:58,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352493787] [2022-03-03 19:29:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:58,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:58,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:58,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352493787] [2022-03-03 19:29:58,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352493787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:58,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639280536] [2022-03-03 19:29:58,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:29:58,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:58,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:29:58,530 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:29:58,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:29:58,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:29:58,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:29:58,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:29:58,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:29:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:29:58,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:29:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:29:58,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639280536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:29:58,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:29:58,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-03-03 19:29:58,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569516706] [2022-03-03 19:29:58,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:29:58,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 19:29:58,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 19:29:58,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:29:58,675 INFO L87 Difference]: Start difference. First operand 328 states and 1001 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:58,722 INFO L93 Difference]: Finished difference Result 646 states and 1931 transitions. [2022-03-03 19:29:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:29:58,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:29:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:58,725 INFO L225 Difference]: With dead ends: 646 [2022-03-03 19:29:58,725 INFO L226 Difference]: Without dead ends: 631 [2022-03-03 19:29:58,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:29:58,727 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:58,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 113 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:29:58,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-03-03 19:29:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 390. [2022-03-03 19:29:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.16452442159383) internal successors, (1231), 389 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1231 transitions. [2022-03-03 19:29:58,738 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1231 transitions. Word has length 19 [2022-03-03 19:29:58,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:58,739 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1231 transitions. [2022-03-03 19:29:58,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:58,739 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1231 transitions. [2022-03-03 19:29:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:29:58,740 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:58,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:58,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:29:58,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:58,955 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:29:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:58,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1555602956, now seen corresponding path program 3 times [2022-03-03 19:29:58,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:58,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739686945] [2022-03-03 19:29:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:58,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:59,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:59,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739686945] [2022-03-03 19:29:59,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739686945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:59,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348927265] [2022-03-03 19:29:59,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:29:59,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:59,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:29:59,014 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:29:59,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:29:59,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:29:59,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:29:59,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:29:59,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:29:59,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:59,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:29:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:59,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348927265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:29:59,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:29:59,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-03 19:29:59,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071032743] [2022-03-03 19:29:59,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:29:59,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:29:59,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:29:59,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:29:59,126 INFO L87 Difference]: Start difference. First operand 390 states and 1231 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:59,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:59,257 INFO L93 Difference]: Finished difference Result 816 states and 2463 transitions. [2022-03-03 19:29:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:29:59,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:29:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:59,260 INFO L225 Difference]: With dead ends: 816 [2022-03-03 19:29:59,260 INFO L226 Difference]: Without dead ends: 673 [2022-03-03 19:29:59,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:29:59,261 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:59,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 190 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:29:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-03-03 19:29:59,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 465. [2022-03-03 19:29:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.2349137931034484) internal successors, (1501), 464 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1501 transitions. [2022-03-03 19:29:59,273 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1501 transitions. Word has length 19 [2022-03-03 19:29:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:59,273 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1501 transitions. [2022-03-03 19:29:59,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1501 transitions. [2022-03-03 19:29:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:29:59,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:59,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:59,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:29:59,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:59,491 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:29:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:29:59,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1118825264, now seen corresponding path program 2 times [2022-03-03 19:29:59,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:29:59,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641828958] [2022-03-03 19:29:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:29:59,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:29:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:29:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:59,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:29:59,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641828958] [2022-03-03 19:29:59,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641828958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:29:59,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118530832] [2022-03-03 19:29:59,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:29:59,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:29:59,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:29:59,518 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:29:59,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:29:59,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:29:59,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:29:59,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:29:59,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:29:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:59,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:29:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:29:59,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118530832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:29:59,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:29:59,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-03-03 19:29:59,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606575169] [2022-03-03 19:29:59,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:29:59,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 19:29:59,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:29:59,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 19:29:59,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:29:59,621 INFO L87 Difference]: Start difference. First operand 465 states and 1501 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:29:59,763 INFO L93 Difference]: Finished difference Result 1402 states and 4444 transitions. [2022-03-03 19:29:59,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:29:59,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:29:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:29:59,769 INFO L225 Difference]: With dead ends: 1402 [2022-03-03 19:29:59,770 INFO L226 Difference]: Without dead ends: 1402 [2022-03-03 19:29:59,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:29:59,771 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:29:59,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 71 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:29:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2022-03-03 19:29:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 797. [2022-03-03 19:29:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4032663316582914) internal successors, (2709), 796 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2709 transitions. [2022-03-03 19:29:59,793 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2709 transitions. Word has length 19 [2022-03-03 19:29:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:29:59,793 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 2709 transitions. [2022-03-03 19:29:59,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:29:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2709 transitions. [2022-03-03 19:29:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:29:59,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:29:59,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:29:59,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:00,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:00,008 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:00,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:00,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1604629368, now seen corresponding path program 3 times [2022-03-03 19:30:00,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:00,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739881245] [2022-03-03 19:30:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:00,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:00,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:00,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739881245] [2022-03-03 19:30:00,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739881245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:00,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282223363] [2022-03-03 19:30:00,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:30:00,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:00,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:00,028 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:00,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:30:00,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:30:00,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:00,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:30:00,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:00,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:00,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282223363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:00,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:00,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-03-03 19:30:00,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357775512] [2022-03-03 19:30:00,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:00,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 19:30:00,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 19:30:00,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:30:00,117 INFO L87 Difference]: Start difference. First operand 797 states and 2709 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:00,210 INFO L93 Difference]: Finished difference Result 1152 states and 3746 transitions. [2022-03-03 19:30:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:30:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:30:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:00,216 INFO L225 Difference]: With dead ends: 1152 [2022-03-03 19:30:00,216 INFO L226 Difference]: Without dead ends: 1140 [2022-03-03 19:30:00,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:30:00,216 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:00,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 21 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:00,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-03-03 19:30:00,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 653. [2022-03-03 19:30:00,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 3.585889570552147) internal successors, (2338), 652 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 2338 transitions. [2022-03-03 19:30:00,251 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 2338 transitions. Word has length 19 [2022-03-03 19:30:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:00,251 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 2338 transitions. [2022-03-03 19:30:00,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 2338 transitions. [2022-03-03 19:30:00,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:00,254 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:00,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:00,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:00,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-03 19:30:00,468 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:00,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:00,468 INFO L85 PathProgramCache]: Analyzing trace with hash -671302374, now seen corresponding path program 4 times [2022-03-03 19:30:00,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:00,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088656055] [2022-03-03 19:30:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:00,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:00,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:00,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088656055] [2022-03-03 19:30:00,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088656055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:00,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554551898] [2022-03-03 19:30:00,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:30:00,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:00,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:00,524 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:00,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:30:00,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:00,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:30:00,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:00,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:30:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:00,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:00,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554551898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:00,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:00,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-03-03 19:30:00,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461353718] [2022-03-03 19:30:00,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:00,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:30:00,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:00,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:30:00,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:30:00,652 INFO L87 Difference]: Start difference. First operand 653 states and 2338 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:00,723 INFO L93 Difference]: Finished difference Result 1011 states and 3340 transitions. [2022-03-03 19:30:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:30:00,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:00,728 INFO L225 Difference]: With dead ends: 1011 [2022-03-03 19:30:00,728 INFO L226 Difference]: Without dead ends: 990 [2022-03-03 19:30:00,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:30:00,728 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:00,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 170 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-03-03 19:30:00,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 730. [2022-03-03 19:30:00,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.5486968449931413) internal successors, (2587), 729 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2587 transitions. [2022-03-03 19:30:00,746 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2587 transitions. Word has length 21 [2022-03-03 19:30:00,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:00,746 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2587 transitions. [2022-03-03 19:30:00,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:00,747 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2587 transitions. [2022-03-03 19:30:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:00,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:00,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:00,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:00,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-03 19:30:00,963 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:00,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1112056780, now seen corresponding path program 5 times [2022-03-03 19:30:00,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:00,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481463251] [2022-03-03 19:30:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:00,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:01,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:01,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481463251] [2022-03-03 19:30:01,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481463251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:01,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530493670] [2022-03-03 19:30:01,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:30:01,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:01,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:01,008 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:01,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:30:01,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:30:01,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:01,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:30:01,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:01,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:01,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530493670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:01,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:01,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-03-03 19:30:01,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731791207] [2022-03-03 19:30:01,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:01,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:30:01,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:01,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:30:01,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:30:01,150 INFO L87 Difference]: Start difference. First operand 730 states and 2587 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:01,247 INFO L93 Difference]: Finished difference Result 1051 states and 3509 transitions. [2022-03-03 19:30:01,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:30:01,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:01,252 INFO L225 Difference]: With dead ends: 1051 [2022-03-03 19:30:01,252 INFO L226 Difference]: Without dead ends: 1030 [2022-03-03 19:30:01,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:30:01,252 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:01,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 135 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-03-03 19:30:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 779. [2022-03-03 19:30:01,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.575835475578406) internal successors, (2782), 778 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:01,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2782 transitions. [2022-03-03 19:30:01,271 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2782 transitions. Word has length 21 [2022-03-03 19:30:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:01,271 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 2782 transitions. [2022-03-03 19:30:01,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2782 transitions. [2022-03-03 19:30:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:01,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:01,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:01,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:01,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-03 19:30:01,489 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash 190269072, now seen corresponding path program 6 times [2022-03-03 19:30:01,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:01,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174828628] [2022-03-03 19:30:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:01,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:01,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:01,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174828628] [2022-03-03 19:30:01,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174828628] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:01,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740254365] [2022-03-03 19:30:01,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:30:01,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:01,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:01,546 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:01,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:30:01,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:30:01,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:01,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:30:01,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:30:01,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:30:01,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740254365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:01,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:01,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-03-03 19:30:01,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700122984] [2022-03-03 19:30:01,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:01,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:30:01,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:30:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:30:01,724 INFO L87 Difference]: Start difference. First operand 779 states and 2782 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:01,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:01,859 INFO L93 Difference]: Finished difference Result 912 states and 3156 transitions. [2022-03-03 19:30:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:30:01,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:01,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:01,863 INFO L225 Difference]: With dead ends: 912 [2022-03-03 19:30:01,863 INFO L226 Difference]: Without dead ends: 885 [2022-03-03 19:30:01,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:30:01,863 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:01,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 178 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-03-03 19:30:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 798. [2022-03-03 19:30:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.5809284818067755) internal successors, (2854), 797 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2854 transitions. [2022-03-03 19:30:01,895 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2854 transitions. Word has length 21 [2022-03-03 19:30:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:01,895 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 2854 transitions. [2022-03-03 19:30:01,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:01,896 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2854 transitions. [2022-03-03 19:30:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:01,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:01,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:01,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:02,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-03 19:30:02,116 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:02,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1942186592, now seen corresponding path program 4 times [2022-03-03 19:30:02,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:02,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524372795] [2022-03-03 19:30:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:02,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:02,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:02,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524372795] [2022-03-03 19:30:02,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524372795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:02,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531768395] [2022-03-03 19:30:02,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:30:02,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:02,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:02,137 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:02,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:30:02,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:30:02,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:02,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:30:02,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:02,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:30:02,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531768395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:30:02,189 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:30:02,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-03-03 19:30:02,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498207794] [2022-03-03 19:30:02,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:30:02,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:30:02,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:02,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:30:02,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:30:02,190 INFO L87 Difference]: Start difference. First operand 798 states and 2854 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:02,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:02,247 INFO L93 Difference]: Finished difference Result 1037 states and 3469 transitions. [2022-03-03 19:30:02,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:30:02,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:02,251 INFO L225 Difference]: With dead ends: 1037 [2022-03-03 19:30:02,251 INFO L226 Difference]: Without dead ends: 1005 [2022-03-03 19:30:02,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:30:02,252 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:02,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 29 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:30:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-03-03 19:30:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 884. [2022-03-03 19:30:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.5130237825594564) internal successors, (3102), 883 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3102 transitions. [2022-03-03 19:30:02,272 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3102 transitions. Word has length 21 [2022-03-03 19:30:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:02,272 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 3102 transitions. [2022-03-03 19:30:02,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:02,272 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3102 transitions. [2022-03-03 19:30:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:02,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:02,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:02,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:02,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-03 19:30:02,479 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash 57075100, now seen corresponding path program 5 times [2022-03-03 19:30:02,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:02,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422513151] [2022-03-03 19:30:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:02,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:30:02,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:02,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422513151] [2022-03-03 19:30:02,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422513151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:30:02,501 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:30:02,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:30:02,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490863478] [2022-03-03 19:30:02,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:30:02,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:30:02,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:30:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:30:02,503 INFO L87 Difference]: Start difference. First operand 884 states and 3102 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:02,534 INFO L93 Difference]: Finished difference Result 974 states and 3311 transitions. [2022-03-03 19:30:02,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:30:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:02,538 INFO L225 Difference]: With dead ends: 974 [2022-03-03 19:30:02,538 INFO L226 Difference]: Without dead ends: 926 [2022-03-03 19:30:02,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:30:02,539 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:02,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 51 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:30:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-03-03 19:30:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 830. [2022-03-03 19:30:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.525934861278649) internal successors, (2923), 829 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2923 transitions. [2022-03-03 19:30:02,557 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2923 transitions. Word has length 21 [2022-03-03 19:30:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:02,557 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2923 transitions. [2022-03-03 19:30:02,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2923 transitions. [2022-03-03 19:30:02,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:02,559 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:02,559 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:02,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-03 19:30:02,560 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:02,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:02,560 INFO L85 PathProgramCache]: Analyzing trace with hash -369540448, now seen corresponding path program 6 times [2022-03-03 19:30:02,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:02,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827746136] [2022-03-03 19:30:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:02,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:02,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:02,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827746136] [2022-03-03 19:30:02,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827746136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:02,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337704040] [2022-03-03 19:30:02,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:30:02,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:02,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:02,587 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:02,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:30:02,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:30:02,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:02,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:30:02,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:02,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:02,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337704040] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:02,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 19:30:02,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2022-03-03 19:30:02,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787483190] [2022-03-03 19:30:02,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:30:02,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:30:02,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:02,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:30:02,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:30:02,707 INFO L87 Difference]: Start difference. First operand 830 states and 2923 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:02,744 INFO L93 Difference]: Finished difference Result 870 states and 3033 transitions. [2022-03-03 19:30:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:30:02,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:02,748 INFO L225 Difference]: With dead ends: 870 [2022-03-03 19:30:02,748 INFO L226 Difference]: Without dead ends: 857 [2022-03-03 19:30:02,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:30:02,749 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:02,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 16 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:30:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-03-03 19:30:02,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 804. [2022-03-03 19:30:02,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.5454545454545454) internal successors, (2847), 803 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2847 transitions. [2022-03-03 19:30:02,765 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2847 transitions. Word has length 21 [2022-03-03 19:30:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:02,765 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2847 transitions. [2022-03-03 19:30:02,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2847 transitions. [2022-03-03 19:30:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:02,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:02,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:02,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:02,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-03 19:30:02,984 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:02,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:02,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1428493028, now seen corresponding path program 7 times [2022-03-03 19:30:02,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:02,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242406319] [2022-03-03 19:30:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:02,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:03,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:03,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242406319] [2022-03-03 19:30:03,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242406319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:03,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377769971] [2022-03-03 19:30:03,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:30:03,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:03,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:03,003 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:03,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:30:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:03,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:30:03,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:03,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:30:03,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377769971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:30:03,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:30:03,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-03-03 19:30:03,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986593980] [2022-03-03 19:30:03,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:30:03,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:30:03,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:03,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:30:03,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:30:03,068 INFO L87 Difference]: Start difference. First operand 804 states and 2847 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:03,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:03,136 INFO L93 Difference]: Finished difference Result 1221 states and 4056 transitions. [2022-03-03 19:30:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:30:03,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:03,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:03,141 INFO L225 Difference]: With dead ends: 1221 [2022-03-03 19:30:03,141 INFO L226 Difference]: Without dead ends: 1201 [2022-03-03 19:30:03,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:30:03,141 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:03,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 42 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-03-03 19:30:03,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 904. [2022-03-03 19:30:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.5957918050941307) internal successors, (3247), 903 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3247 transitions. [2022-03-03 19:30:03,164 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3247 transitions. Word has length 21 [2022-03-03 19:30:03,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:03,164 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 3247 transitions. [2022-03-03 19:30:03,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:03,164 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3247 transitions. [2022-03-03 19:30:03,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:03,166 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:03,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:03,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:03,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:03,382 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:03,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:03,383 INFO L85 PathProgramCache]: Analyzing trace with hash -679790180, now seen corresponding path program 8 times [2022-03-03 19:30:03,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:03,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471229956] [2022-03-03 19:30:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:03,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:03,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:03,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471229956] [2022-03-03 19:30:03,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471229956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:03,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813898928] [2022-03-03 19:30:03,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:30:03,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:03,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:03,404 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:03,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:30:03,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:30:03,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:30:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:03,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:03,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813898928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:03,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:03,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-03-03 19:30:03,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585726597] [2022-03-03 19:30:03,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:03,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:30:03,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:03,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:30:03,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:30:03,572 INFO L87 Difference]: Start difference. First operand 904 states and 3247 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:03,745 INFO L93 Difference]: Finished difference Result 1454 states and 4620 transitions. [2022-03-03 19:30:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:30:03,746 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:03,752 INFO L225 Difference]: With dead ends: 1454 [2022-03-03 19:30:03,752 INFO L226 Difference]: Without dead ends: 1412 [2022-03-03 19:30:03,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:30:03,753 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 139 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:03,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 118 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-03-03 19:30:03,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 920. [2022-03-03 19:30:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.5070729053318823) internal successors, (3223), 919 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:03,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3223 transitions. [2022-03-03 19:30:03,776 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3223 transitions. Word has length 21 [2022-03-03 19:30:03,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:03,777 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 3223 transitions. [2022-03-03 19:30:03,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:03,777 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3223 transitions. [2022-03-03 19:30:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:03,779 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:03,779 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:03,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:03,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:03,996 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:03,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:03,996 INFO L85 PathProgramCache]: Analyzing trace with hash -849904168, now seen corresponding path program 9 times [2022-03-03 19:30:03,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:03,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876370192] [2022-03-03 19:30:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:03,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:04,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:04,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876370192] [2022-03-03 19:30:04,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876370192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:04,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450994861] [2022-03-03 19:30:04,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:30:04,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:04,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:04,060 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:04,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:30:04,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:30:04,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:04,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:30:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:04,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:04,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450994861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:04,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:04,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-03-03 19:30:04,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651031643] [2022-03-03 19:30:04,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:04,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:30:04,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:30:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:30:04,258 INFO L87 Difference]: Start difference. First operand 920 states and 3223 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:04,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:04,435 INFO L93 Difference]: Finished difference Result 1679 states and 5671 transitions. [2022-03-03 19:30:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:30:04,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:04,449 INFO L225 Difference]: With dead ends: 1679 [2022-03-03 19:30:04,449 INFO L226 Difference]: Without dead ends: 1653 [2022-03-03 19:30:04,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:30:04,450 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:04,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 46 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-03-03 19:30:04,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1158. [2022-03-03 19:30:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.5419187554019014) internal successors, (4098), 1157 states have internal predecessors, (4098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 4098 transitions. [2022-03-03 19:30:04,480 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 4098 transitions. Word has length 21 [2022-03-03 19:30:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:04,481 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 4098 transitions. [2022-03-03 19:30:04,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:04,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 4098 transitions. [2022-03-03 19:30:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:04,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:04,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:04,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:04,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:04,708 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:04,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:04,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1595463124, now seen corresponding path program 10 times [2022-03-03 19:30:04,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:04,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20854908] [2022-03-03 19:30:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:04,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:04,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:04,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20854908] [2022-03-03 19:30:04,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20854908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:04,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468447040] [2022-03-03 19:30:04,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:30:04,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:04,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:04,740 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:04,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:30:04,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:30:04,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:04,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:30:04,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:04,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:04,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468447040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:04,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:04,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-03-03 19:30:04,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144335757] [2022-03-03 19:30:04,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:04,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:30:04,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:04,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:30:04,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:30:04,899 INFO L87 Difference]: Start difference. First operand 1158 states and 4098 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:05,098 INFO L93 Difference]: Finished difference Result 2209 states and 7293 transitions. [2022-03-03 19:30:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:30:05,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:05,104 INFO L225 Difference]: With dead ends: 2209 [2022-03-03 19:30:05,104 INFO L226 Difference]: Without dead ends: 2209 [2022-03-03 19:30:05,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:30:05,106 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:05,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 103 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2022-03-03 19:30:05,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1285. [2022-03-03 19:30:05,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.5856697819314642) internal successors, (4604), 1284 states have internal predecessors, (4604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 4604 transitions. [2022-03-03 19:30:05,136 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 4604 transitions. Word has length 21 [2022-03-03 19:30:05,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:05,136 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 4604 transitions. [2022-03-03 19:30:05,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:05,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 4604 transitions. [2022-03-03 19:30:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:05,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:05,138 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:05,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:05,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:05,351 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:05,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:05,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1594229548, now seen corresponding path program 11 times [2022-03-03 19:30:05,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:05,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615975349] [2022-03-03 19:30:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:05,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:05,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:05,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615975349] [2022-03-03 19:30:05,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615975349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:05,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692116577] [2022-03-03 19:30:05,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:30:05,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:05,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:05,374 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:05,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:30:05,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:30:05,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:05,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:30:05,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:05,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:05,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692116577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:05,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:05,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-03-03 19:30:05,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455809362] [2022-03-03 19:30:05,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:05,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:30:05,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:05,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:30:05,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:30:05,558 INFO L87 Difference]: Start difference. First operand 1285 states and 4604 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:05,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:05,774 INFO L93 Difference]: Finished difference Result 1613 states and 5504 transitions. [2022-03-03 19:30:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:30:05,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:05,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:05,778 INFO L225 Difference]: With dead ends: 1613 [2022-03-03 19:30:05,778 INFO L226 Difference]: Without dead ends: 1581 [2022-03-03 19:30:05,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:30:05,779 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:05,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 106 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2022-03-03 19:30:05,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1273. [2022-03-03 19:30:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 3.5550314465408803) internal successors, (4522), 1272 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 4522 transitions. [2022-03-03 19:30:05,804 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 4522 transitions. Word has length 21 [2022-03-03 19:30:05,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:05,804 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 4522 transitions. [2022-03-03 19:30:05,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 4522 transitions. [2022-03-03 19:30:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:05,806 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:05,806 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:05,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-03 19:30:06,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:06,026 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:06,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:06,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1935867080, now seen corresponding path program 12 times [2022-03-03 19:30:06,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:06,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695177398] [2022-03-03 19:30:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:06,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:06,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:06,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695177398] [2022-03-03 19:30:06,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695177398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:06,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169936400] [2022-03-03 19:30:06,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:30:06,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:06,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:06,053 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:06,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:30:06,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:30:06,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:06,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:30:06,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:06,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:06,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169936400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:06,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:06,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-03-03 19:30:06,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213199724] [2022-03-03 19:30:06,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:06,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:30:06,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:06,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:30:06,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:30:06,216 INFO L87 Difference]: Start difference. First operand 1273 states and 4522 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:06,403 INFO L93 Difference]: Finished difference Result 2164 states and 7115 transitions. [2022-03-03 19:30:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:30:06,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:06,408 INFO L225 Difference]: With dead ends: 2164 [2022-03-03 19:30:06,408 INFO L226 Difference]: Without dead ends: 2156 [2022-03-03 19:30:06,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:30:06,409 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 164 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:06,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 108 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2022-03-03 19:30:06,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1534. [2022-03-03 19:30:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.5851272015655575) internal successors, (5496), 1533 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5496 transitions. [2022-03-03 19:30:06,440 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5496 transitions. Word has length 21 [2022-03-03 19:30:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:06,440 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 5496 transitions. [2022-03-03 19:30:06,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5496 transitions. [2022-03-03 19:30:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:06,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:06,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:06,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:06,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:06,660 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash 524199368, now seen corresponding path program 13 times [2022-03-03 19:30:06,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:06,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937123961] [2022-03-03 19:30:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:06,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:06,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:06,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937123961] [2022-03-03 19:30:06,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937123961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:06,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268827962] [2022-03-03 19:30:06,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:30:06,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:06,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:06,688 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:06,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:30:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:06,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:30:06,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:06,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:06,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268827962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:06,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:06,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-03-03 19:30:06,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985742156] [2022-03-03 19:30:06,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:06,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:30:06,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:06,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:30:06,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:30:06,861 INFO L87 Difference]: Start difference. First operand 1534 states and 5496 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:07,098 INFO L93 Difference]: Finished difference Result 2841 states and 9935 transitions. [2022-03-03 19:30:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:30:07,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:07,105 INFO L225 Difference]: With dead ends: 2841 [2022-03-03 19:30:07,105 INFO L226 Difference]: Without dead ends: 2831 [2022-03-03 19:30:07,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:30:07,106 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 162 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:07,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 53 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2022-03-03 19:30:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 1813. [2022-03-03 19:30:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.587748344370861) internal successors, (6501), 1812 states have internal predecessors, (6501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:07,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 6501 transitions. [2022-03-03 19:30:07,143 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 6501 transitions. Word has length 21 [2022-03-03 19:30:07,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:07,143 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 6501 transitions. [2022-03-03 19:30:07,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 6501 transitions. [2022-03-03 19:30:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:07,147 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:07,147 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:07,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:07,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-03 19:30:07,363 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:07,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1808991432, now seen corresponding path program 14 times [2022-03-03 19:30:07,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:07,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911188328] [2022-03-03 19:30:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:07,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:07,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:07,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911188328] [2022-03-03 19:30:07,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911188328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:07,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288733936] [2022-03-03 19:30:07,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:30:07,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:07,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:07,394 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:07,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:30:07,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:07,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:30:07,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:30:07,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:07,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:07,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288733936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:07,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:07,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-03-03 19:30:07,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418312502] [2022-03-03 19:30:07,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:07,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:30:07,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:07,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:30:07,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:30:07,567 INFO L87 Difference]: Start difference. First operand 1813 states and 6501 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:07,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:07,749 INFO L93 Difference]: Finished difference Result 2259 states and 7725 transitions. [2022-03-03 19:30:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:30:07,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:07,754 INFO L225 Difference]: With dead ends: 2259 [2022-03-03 19:30:07,754 INFO L226 Difference]: Without dead ends: 2247 [2022-03-03 19:30:07,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=232, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:30:07,754 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:07,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 83 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2022-03-03 19:30:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1809. [2022-03-03 19:30:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.587942477876106) internal successors, (6487), 1808 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6487 transitions. [2022-03-03 19:30:07,786 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6487 transitions. Word has length 21 [2022-03-03 19:30:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:07,786 INFO L470 AbstractCegarLoop]: Abstraction has 1809 states and 6487 transitions. [2022-03-03 19:30:07,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6487 transitions. [2022-03-03 19:30:07,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:07,790 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:07,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:07,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:08,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-03 19:30:08,005 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:08,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:08,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1458153844, now seen corresponding path program 15 times [2022-03-03 19:30:08,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:08,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032209925] [2022-03-03 19:30:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:08,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:08,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:08,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032209925] [2022-03-03 19:30:08,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032209925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:08,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444543725] [2022-03-03 19:30:08,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:30:08,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:08,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:08,034 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:08,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:30:08,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:30:08,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:08,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:30:08,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:08,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:08,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444543725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:08,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:08,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-03-03 19:30:08,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328625931] [2022-03-03 19:30:08,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:08,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:30:08,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:08,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:30:08,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:30:08,174 INFO L87 Difference]: Start difference. First operand 1809 states and 6487 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:08,407 INFO L93 Difference]: Finished difference Result 3116 states and 10468 transitions. [2022-03-03 19:30:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:30:08,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:08,415 INFO L225 Difference]: With dead ends: 3116 [2022-03-03 19:30:08,415 INFO L226 Difference]: Without dead ends: 3116 [2022-03-03 19:30:08,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:30:08,416 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:08,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 161 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2022-03-03 19:30:08,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 1975. [2022-03-03 19:30:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 3.569908814589666) internal successors, (7047), 1974 states have internal predecessors, (7047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 7047 transitions. [2022-03-03 19:30:08,480 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 7047 transitions. Word has length 21 [2022-03-03 19:30:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:08,480 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 7047 transitions. [2022-03-03 19:30:08,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 7047 transitions. [2022-03-03 19:30:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:08,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:08,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:08,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:08,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-03 19:30:08,700 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:08,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:08,700 INFO L85 PathProgramCache]: Analyzing trace with hash -27282996, now seen corresponding path program 16 times [2022-03-03 19:30:08,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:08,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039161642] [2022-03-03 19:30:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:08,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:08,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:08,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039161642] [2022-03-03 19:30:08,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039161642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:08,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323232486] [2022-03-03 19:30:08,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:30:08,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:08,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:08,725 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:08,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:30:08,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:30:08,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:08,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:30:08,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:08,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:08,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323232486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:08,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:08,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-03-03 19:30:08,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100355700] [2022-03-03 19:30:08,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:08,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:30:08,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:08,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:30:08,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:30:08,885 INFO L87 Difference]: Start difference. First operand 1975 states and 7047 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:09,074 INFO L93 Difference]: Finished difference Result 2407 states and 8257 transitions. [2022-03-03 19:30:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:30:09,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:09,080 INFO L225 Difference]: With dead ends: 2407 [2022-03-03 19:30:09,080 INFO L226 Difference]: Without dead ends: 2361 [2022-03-03 19:30:09,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:30:09,081 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:09,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 73 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2022-03-03 19:30:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2032. [2022-03-03 19:30:09,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 3.539635647464303) internal successors, (7189), 2031 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 7189 transitions. [2022-03-03 19:30:09,124 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 7189 transitions. Word has length 21 [2022-03-03 19:30:09,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:09,125 INFO L470 AbstractCegarLoop]: Abstraction has 2032 states and 7189 transitions. [2022-03-03 19:30:09,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 7189 transitions. [2022-03-03 19:30:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:09,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:09,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:09,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-03 19:30:09,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:09,343 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:09,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:09,344 INFO L85 PathProgramCache]: Analyzing trace with hash 263688078, now seen corresponding path program 7 times [2022-03-03 19:30:09,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:09,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074573801] [2022-03-03 19:30:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:09,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:09,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:09,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074573801] [2022-03-03 19:30:09,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074573801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:09,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102988580] [2022-03-03 19:30:09,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:30:09,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:09,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:09,394 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:09,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:30:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:09,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:30:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:30:09,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:30:09,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102988580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:09,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:09,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-03-03 19:30:09,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723936072] [2022-03-03 19:30:09,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:09,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:30:09,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:09,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:30:09,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:30:09,507 INFO L87 Difference]: Start difference. First operand 2032 states and 7189 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:09,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:09,626 INFO L93 Difference]: Finished difference Result 2352 states and 8100 transitions. [2022-03-03 19:30:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:30:09,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:09,646 INFO L225 Difference]: With dead ends: 2352 [2022-03-03 19:30:09,646 INFO L226 Difference]: Without dead ends: 2331 [2022-03-03 19:30:09,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:30:09,647 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 60 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:09,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 207 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2022-03-03 19:30:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2045. [2022-03-03 19:30:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.5484344422700587) internal successors, (7253), 2044 states have internal predecessors, (7253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7253 transitions. [2022-03-03 19:30:09,687 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7253 transitions. Word has length 21 [2022-03-03 19:30:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:09,687 INFO L470 AbstractCegarLoop]: Abstraction has 2045 states and 7253 transitions. [2022-03-03 19:30:09,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7253 transitions. [2022-03-03 19:30:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:09,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:09,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:09,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:09,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 19:30:09,903 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:09,904 INFO L85 PathProgramCache]: Analyzing trace with hash -658099630, now seen corresponding path program 8 times [2022-03-03 19:30:09,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:09,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441925571] [2022-03-03 19:30:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:09,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:09,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:09,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441925571] [2022-03-03 19:30:09,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441925571] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:09,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105958665] [2022-03-03 19:30:09,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:30:09,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:09,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:09,973 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:09,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:30:09,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:30:09,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:09,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:30:09,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:30:10,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:30:10,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105958665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:10,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:10,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-03-03 19:30:10,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011292544] [2022-03-03 19:30:10,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:10,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:30:10,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:30:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:30:10,124 INFO L87 Difference]: Start difference. First operand 2045 states and 7253 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:10,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:10,243 INFO L93 Difference]: Finished difference Result 2262 states and 7867 transitions. [2022-03-03 19:30:10,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:30:10,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:10,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:10,248 INFO L225 Difference]: With dead ends: 2262 [2022-03-03 19:30:10,248 INFO L226 Difference]: Without dead ends: 2241 [2022-03-03 19:30:10,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:30:10,249 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:10,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 189 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2022-03-03 19:30:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 2055. [2022-03-03 19:30:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.552093476144109) internal successors, (7296), 2054 states have internal predecessors, (7296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 7296 transitions. [2022-03-03 19:30:10,281 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 7296 transitions. Word has length 21 [2022-03-03 19:30:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:10,281 INFO L470 AbstractCegarLoop]: Abstraction has 2055 states and 7296 transitions. [2022-03-03 19:30:10,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 7296 transitions. [2022-03-03 19:30:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:30:10,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:10,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:10,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:10,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:10,501 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:10,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1826441102, now seen corresponding path program 9 times [2022-03-03 19:30:10,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:10,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227038739] [2022-03-03 19:30:10,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:10,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:10,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:10,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227038739] [2022-03-03 19:30:10,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227038739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:10,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800648980] [2022-03-03 19:30:10,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:30:10,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:10,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:10,553 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:10,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:30:10,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:30:10,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:10,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:30:10,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:30:10,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:30:10,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800648980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:10,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:10,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-03 19:30:10,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803682970] [2022-03-03 19:30:10,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:10,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:30:10,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:10,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:30:10,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:30:10,670 INFO L87 Difference]: Start difference. First operand 2055 states and 7296 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:10,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:10,815 INFO L93 Difference]: Finished difference Result 2335 states and 8077 transitions. [2022-03-03 19:30:10,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:30:10,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:30:10,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:10,820 INFO L225 Difference]: With dead ends: 2335 [2022-03-03 19:30:10,820 INFO L226 Difference]: Without dead ends: 2314 [2022-03-03 19:30:10,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:30:10,821 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 61 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:10,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 276 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-03 19:30:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2071. [2022-03-03 19:30:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 2070 states have (on average 3.557487922705314) internal successors, (7364), 2070 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 7364 transitions. [2022-03-03 19:30:10,855 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 7364 transitions. Word has length 21 [2022-03-03 19:30:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:10,855 INFO L470 AbstractCegarLoop]: Abstraction has 2071 states and 7364 transitions. [2022-03-03 19:30:10,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 7364 transitions. [2022-03-03 19:30:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:10,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:10,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:10,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:11,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-03 19:30:11,073 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:11,074 INFO L85 PathProgramCache]: Analyzing trace with hash 766837372, now seen corresponding path program 10 times [2022-03-03 19:30:11,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:11,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534226431] [2022-03-03 19:30:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:11,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:11,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:11,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534226431] [2022-03-03 19:30:11,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534226431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:11,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021660020] [2022-03-03 19:30:11,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:30:11,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:11,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:11,112 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:11,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:30:11,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:30:11,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:11,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:30:11,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:11,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:11,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021660020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:11,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:11,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-03 19:30:11,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066688062] [2022-03-03 19:30:11,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:11,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:30:11,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:11,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:30:11,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:30:11,263 INFO L87 Difference]: Start difference. First operand 2071 states and 7364 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:11,545 INFO L93 Difference]: Finished difference Result 8017 states and 28472 transitions. [2022-03-03 19:30:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:30:11,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:11,561 INFO L225 Difference]: With dead ends: 8017 [2022-03-03 19:30:11,562 INFO L226 Difference]: Without dead ends: 8017 [2022-03-03 19:30:11,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:30:11,562 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:11,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 104 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:30:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8017 states. [2022-03-03 19:30:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8017 to 4750. [2022-03-03 19:30:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4750 states, 4749 states have (on average 3.6249736786691935) internal successors, (17215), 4749 states have internal predecessors, (17215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4750 states to 4750 states and 17215 transitions. [2022-03-03 19:30:11,662 INFO L78 Accepts]: Start accepts. Automaton has 4750 states and 17215 transitions. Word has length 23 [2022-03-03 19:30:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:11,662 INFO L470 AbstractCegarLoop]: Abstraction has 4750 states and 17215 transitions. [2022-03-03 19:30:11,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4750 states and 17215 transitions. [2022-03-03 19:30:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:11,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:11,671 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:11,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-03 19:30:11,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:11,886 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:11,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash -439625992, now seen corresponding path program 11 times [2022-03-03 19:30:11,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:11,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273163217] [2022-03-03 19:30:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:11,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:11,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:11,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273163217] [2022-03-03 19:30:11,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273163217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:11,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780929778] [2022-03-03 19:30:11,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:30:11,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:11,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:11,910 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:11,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:30:11,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:30:11,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:11,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:30:11,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:11,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:12,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780929778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:12,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:12,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-03-03 19:30:12,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282208001] [2022-03-03 19:30:12,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:12,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:30:12,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:12,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:30:12,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:30:12,054 INFO L87 Difference]: Start difference. First operand 4750 states and 17215 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:12,287 INFO L93 Difference]: Finished difference Result 5512 states and 19596 transitions. [2022-03-03 19:30:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:30:12,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:12,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:12,297 INFO L225 Difference]: With dead ends: 5512 [2022-03-03 19:30:12,297 INFO L226 Difference]: Without dead ends: 5456 [2022-03-03 19:30:12,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:30:12,298 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 165 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:12,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 53 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:30:12,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2022-03-03 19:30:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 4829. [2022-03-03 19:30:12,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 3.6184755592377797) internal successors, (17470), 4828 states have internal predecessors, (17470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:12,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 17470 transitions. [2022-03-03 19:30:12,382 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 17470 transitions. Word has length 23 [2022-03-03 19:30:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:12,382 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 17470 transitions. [2022-03-03 19:30:12,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 17470 transitions. [2022-03-03 19:30:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:12,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:12,391 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:12,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:12,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:12,591 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:12,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:12,591 INFO L85 PathProgramCache]: Analyzing trace with hash -630242892, now seen corresponding path program 12 times [2022-03-03 19:30:12,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:12,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529974992] [2022-03-03 19:30:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:12,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:12,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:12,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529974992] [2022-03-03 19:30:12,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529974992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:12,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386690871] [2022-03-03 19:30:12,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:30:12,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:12,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:12,732 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:12,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:30:12,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:30:12,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:12,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:30:12,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:12,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:12,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386690871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:12,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:12,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-03 19:30:12,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684580587] [2022-03-03 19:30:12,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:12,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:30:12,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:30:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:30:12,933 INFO L87 Difference]: Start difference. First operand 4829 states and 17470 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:13,284 INFO L93 Difference]: Finished difference Result 7408 states and 25768 transitions. [2022-03-03 19:30:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:30:13,284 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:13,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:13,322 INFO L225 Difference]: With dead ends: 7408 [2022-03-03 19:30:13,322 INFO L226 Difference]: Without dead ends: 7400 [2022-03-03 19:30:13,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:30:13,323 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 294 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:13,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 136 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:30:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7400 states. [2022-03-03 19:30:13,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7400 to 6112. [2022-03-03 19:30:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 3.6293568973981345) internal successors, (22179), 6111 states have internal predecessors, (22179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 22179 transitions. [2022-03-03 19:30:13,424 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 22179 transitions. Word has length 23 [2022-03-03 19:30:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:13,424 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 22179 transitions. [2022-03-03 19:30:13,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:13,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 22179 transitions. [2022-03-03 19:30:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:13,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:13,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:13,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:13,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:13,641 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:13,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:13,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2041910604, now seen corresponding path program 1 times [2022-03-03 19:30:13,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:13,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612804720] [2022-03-03 19:30:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:13,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:13,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:13,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612804720] [2022-03-03 19:30:13,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612804720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:13,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887215343] [2022-03-03 19:30:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:13,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:13,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:13,675 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:13,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:30:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:13,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:30:13,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:13,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:13,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887215343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:13,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:13,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-03 19:30:13,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420037630] [2022-03-03 19:30:13,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:13,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:30:13,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:30:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:30:13,886 INFO L87 Difference]: Start difference. First operand 6112 states and 22179 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:14,206 INFO L93 Difference]: Finished difference Result 14261 states and 51664 transitions. [2022-03-03 19:30:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:30:14,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:14,242 INFO L225 Difference]: With dead ends: 14261 [2022-03-03 19:30:14,242 INFO L226 Difference]: Without dead ends: 14255 [2022-03-03 19:30:14,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:30:14,243 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 222 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:14,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 70 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:30:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14255 states. [2022-03-03 19:30:14,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14255 to 11458. [2022-03-03 19:30:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11458 states, 11457 states have (on average 3.6823775857554333) internal successors, (42189), 11457 states have internal predecessors, (42189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11458 states to 11458 states and 42189 transitions. [2022-03-03 19:30:14,549 INFO L78 Accepts]: Start accepts. Automaton has 11458 states and 42189 transitions. Word has length 23 [2022-03-03 19:30:14,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:14,549 INFO L470 AbstractCegarLoop]: Abstraction has 11458 states and 42189 transitions. [2022-03-03 19:30:14,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand 11458 states and 42189 transitions. [2022-03-03 19:30:14,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:14,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:14,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:14,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:14,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-03 19:30:14,786 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:14,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1063353160, now seen corresponding path program 2 times [2022-03-03 19:30:14,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:14,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723204713] [2022-03-03 19:30:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:14,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:14,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:14,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723204713] [2022-03-03 19:30:14,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723204713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:14,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879497356] [2022-03-03 19:30:14,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:30:14,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:14,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:14,870 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:14,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:30:14,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:30:14,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:14,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:30:14,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:14,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:15,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879497356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:15,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:15,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-03 19:30:15,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831443760] [2022-03-03 19:30:15,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:15,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:30:15,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:15,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:30:15,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:30:15,072 INFO L87 Difference]: Start difference. First operand 11458 states and 42189 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:15,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:15,580 INFO L93 Difference]: Finished difference Result 23254 states and 84564 transitions. [2022-03-03 19:30:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:30:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:15,639 INFO L225 Difference]: With dead ends: 23254 [2022-03-03 19:30:15,640 INFO L226 Difference]: Without dead ends: 23254 [2022-03-03 19:30:15,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=357, Invalid=699, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:30:15,640 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 294 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:15,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 162 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:30:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23254 states. [2022-03-03 19:30:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23254 to 18401. [2022-03-03 19:30:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18401 states, 18400 states have (on average 3.7019021739130435) internal successors, (68115), 18400 states have internal predecessors, (68115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18401 states to 18401 states and 68115 transitions. [2022-03-03 19:30:16,216 INFO L78 Accepts]: Start accepts. Automaton has 18401 states and 68115 transitions. Word has length 23 [2022-03-03 19:30:16,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:16,216 INFO L470 AbstractCegarLoop]: Abstraction has 18401 states and 68115 transitions. [2022-03-03 19:30:16,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 18401 states and 68115 transitions. [2022-03-03 19:30:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:16,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:16,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:16,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:16,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-03 19:30:16,455 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:16,456 INFO L85 PathProgramCache]: Analyzing trace with hash -757118540, now seen corresponding path program 13 times [2022-03-03 19:30:16,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:16,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707885100] [2022-03-03 19:30:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:16,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:16,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:16,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707885100] [2022-03-03 19:30:16,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707885100] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:16,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288087344] [2022-03-03 19:30:16,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:30:16,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:16,480 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:16,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:30:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:16,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:30:16,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:16,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:16,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288087344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:16,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:16,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-03 19:30:16,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980242781] [2022-03-03 19:30:16,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:16,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:30:16,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:16,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:30:16,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:30:16,683 INFO L87 Difference]: Start difference. First operand 18401 states and 68115 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:17,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:17,216 INFO L93 Difference]: Finished difference Result 19801 states and 72677 transitions. [2022-03-03 19:30:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:30:17,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:17,271 INFO L225 Difference]: With dead ends: 19801 [2022-03-03 19:30:17,272 INFO L226 Difference]: Without dead ends: 19781 [2022-03-03 19:30:17,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=475, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:30:17,272 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 223 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:17,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 98 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:30:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19781 states. [2022-03-03 19:30:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19781 to 18392. [2022-03-03 19:30:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18392 states, 18391 states have (on average 3.7013756728834757) internal successors, (68072), 18391 states have internal predecessors, (68072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18392 states to 18392 states and 68072 transitions. [2022-03-03 19:30:17,742 INFO L78 Accepts]: Start accepts. Automaton has 18392 states and 68072 transitions. Word has length 23 [2022-03-03 19:30:17,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:17,742 INFO L470 AbstractCegarLoop]: Abstraction has 18392 states and 68072 transitions. [2022-03-03 19:30:17,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand 18392 states and 68072 transitions. [2022-03-03 19:30:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:17,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:17,858 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:17,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:18,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:18,059 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:18,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:18,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1151142540, now seen corresponding path program 3 times [2022-03-03 19:30:18,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:18,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633387354] [2022-03-03 19:30:18,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:18,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:18,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:18,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633387354] [2022-03-03 19:30:18,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633387354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:18,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78250701] [2022-03-03 19:30:18,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:30:18,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:18,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:18,131 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:18,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:30:18,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:30:18,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:18,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:30:18,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:18,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:18,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78250701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:18,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:18,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-03 19:30:18,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772923582] [2022-03-03 19:30:18,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:18,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:30:18,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:30:18,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:30:18,308 INFO L87 Difference]: Start difference. First operand 18392 states and 68072 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:18,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:18,843 INFO L93 Difference]: Finished difference Result 31050 states and 114087 transitions. [2022-03-03 19:30:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:30:18,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:18,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:18,938 INFO L225 Difference]: With dead ends: 31050 [2022-03-03 19:30:18,938 INFO L226 Difference]: Without dead ends: 31050 [2022-03-03 19:30:18,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:30:18,939 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 302 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:18,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 121 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:30:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31050 states. [2022-03-03 19:30:19,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31050 to 18487. [2022-03-03 19:30:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18487 states, 18486 states have (on average 3.6850589635399764) internal successors, (68122), 18486 states have internal predecessors, (68122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18487 states to 18487 states and 68122 transitions. [2022-03-03 19:30:19,459 INFO L78 Accepts]: Start accepts. Automaton has 18487 states and 68122 transitions. Word has length 23 [2022-03-03 19:30:19,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:19,460 INFO L470 AbstractCegarLoop]: Abstraction has 18487 states and 68122 transitions. [2022-03-03 19:30:19,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:19,460 INFO L276 IsEmpty]: Start isEmpty. Operand 18487 states and 68122 transitions. [2022-03-03 19:30:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:19,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:19,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:19,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-03 19:30:19,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-03 19:30:19,694 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:19,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:19,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1701574328, now seen corresponding path program 14 times [2022-03-03 19:30:19,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:19,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64110452] [2022-03-03 19:30:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:19,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:19,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:19,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64110452] [2022-03-03 19:30:19,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64110452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:19,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832867900] [2022-03-03 19:30:19,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:30:19,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:19,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:19,721 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:19,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:30:19,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:30:19,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:19,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:30:19,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:19,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:19,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832867900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:19,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:19,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-03 19:30:19,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927452493] [2022-03-03 19:30:19,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:19,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:30:19,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:30:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:30:19,976 INFO L87 Difference]: Start difference. First operand 18487 states and 68122 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:20,388 INFO L93 Difference]: Finished difference Result 19677 states and 71789 transitions. [2022-03-03 19:30:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:30:20,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:20,572 INFO L225 Difference]: With dead ends: 19677 [2022-03-03 19:30:20,572 INFO L226 Difference]: Without dead ends: 19617 [2022-03-03 19:30:20,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=442, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:30:20,573 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 247 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:20,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 75 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:30:20,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19617 states. [2022-03-03 19:30:20,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19617 to 18487. [2022-03-03 19:30:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18487 states, 18486 states have (on average 3.6806231742940603) internal successors, (68040), 18486 states have internal predecessors, (68040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18487 states to 18487 states and 68040 transitions. [2022-03-03 19:30:20,965 INFO L78 Accepts]: Start accepts. Automaton has 18487 states and 68040 transitions. Word has length 23 [2022-03-03 19:30:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:20,965 INFO L470 AbstractCegarLoop]: Abstraction has 18487 states and 68040 transitions. [2022-03-03 19:30:20,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 18487 states and 68040 transitions. [2022-03-03 19:30:20,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:20,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:20,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:21,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:21,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 19:30:21,207 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1169726578, now seen corresponding path program 4 times [2022-03-03 19:30:21,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:21,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544855596] [2022-03-03 19:30:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:21,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:21,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544855596] [2022-03-03 19:30:21,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544855596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:21,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898329130] [2022-03-03 19:30:21,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:30:21,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:21,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:21,279 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:21,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:30:21,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:30:21,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:21,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:30:21,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:21,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:21,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898329130] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:21,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:21,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:30:21,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460305155] [2022-03-03 19:30:21,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:21,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:30:21,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:21,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:30:21,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:30:21,681 INFO L87 Difference]: Start difference. First operand 18487 states and 68040 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:22,848 INFO L93 Difference]: Finished difference Result 26583 states and 95562 transitions. [2022-03-03 19:30:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:30:22,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:22,918 INFO L225 Difference]: With dead ends: 26583 [2022-03-03 19:30:22,918 INFO L226 Difference]: Without dead ends: 26479 [2022-03-03 19:30:22,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=391, Invalid=1415, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:30:22,919 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 285 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:22,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 211 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:30:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26479 states. [2022-03-03 19:30:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26479 to 19145. [2022-03-03 19:30:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19145 states, 19144 states have (on average 3.6745716673631423) internal successors, (70346), 19144 states have internal predecessors, (70346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19145 states to 19145 states and 70346 transitions. [2022-03-03 19:30:23,382 INFO L78 Accepts]: Start accepts. Automaton has 19145 states and 70346 transitions. Word has length 23 [2022-03-03 19:30:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:23,382 INFO L470 AbstractCegarLoop]: Abstraction has 19145 states and 70346 transitions. [2022-03-03 19:30:23,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 19145 states and 70346 transitions. [2022-03-03 19:30:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:23,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:23,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:23,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:23,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 19:30:23,613 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:23,613 INFO L85 PathProgramCache]: Analyzing trace with hash -373032338, now seen corresponding path program 5 times [2022-03-03 19:30:23,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:23,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172851917] [2022-03-03 19:30:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:23,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:23,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:23,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172851917] [2022-03-03 19:30:23,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172851917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:23,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576427311] [2022-03-03 19:30:23,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:30:23,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:23,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:23,715 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:23,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:30:23,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:30:23,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:30:23,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:23,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:24,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576427311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:24,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:24,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:30:24,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093679618] [2022-03-03 19:30:24,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:24,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:30:24,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:24,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:30:24,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:30:24,125 INFO L87 Difference]: Start difference. First operand 19145 states and 70346 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:24,955 INFO L93 Difference]: Finished difference Result 20543 states and 74413 transitions. [2022-03-03 19:30:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:30:24,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:24,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:25,011 INFO L225 Difference]: With dead ends: 20543 [2022-03-03 19:30:25,011 INFO L226 Difference]: Without dead ends: 20495 [2022-03-03 19:30:25,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=932, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:30:25,012 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 153 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:25,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 216 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 575 Invalid, 0 Unknown, 198 Unchecked, 0.3s Time] [2022-03-03 19:30:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20495 states. [2022-03-03 19:30:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20495 to 19199. [2022-03-03 19:30:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19199 states, 19198 states have (on average 3.672465881862694) internal successors, (70504), 19198 states have internal predecessors, (70504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:25,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19199 states to 19199 states and 70504 transitions. [2022-03-03 19:30:25,449 INFO L78 Accepts]: Start accepts. Automaton has 19199 states and 70504 transitions. Word has length 23 [2022-03-03 19:30:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:25,449 INFO L470 AbstractCegarLoop]: Abstraction has 19199 states and 70504 transitions. [2022-03-03 19:30:25,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:25,449 INFO L276 IsEmpty]: Start isEmpty. Operand 19199 states and 70504 transitions. [2022-03-03 19:30:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:25,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:25,480 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:25,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-03 19:30:25,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:25,682 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:25,683 INFO L85 PathProgramCache]: Analyzing trace with hash -454431394, now seen corresponding path program 6 times [2022-03-03 19:30:25,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:25,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268282191] [2022-03-03 19:30:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:25,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:25,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:25,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268282191] [2022-03-03 19:30:25,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268282191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:25,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838176094] [2022-03-03 19:30:25,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:30:25,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:25,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:25,760 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:25,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:30:25,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:30:25,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:25,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:30:25,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:25,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:26,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838176094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:26,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:26,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:30:26,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133768376] [2022-03-03 19:30:26,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:26,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:30:26,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:26,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:30:26,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:30:26,206 INFO L87 Difference]: Start difference. First operand 19199 states and 70504 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:27,932 INFO L93 Difference]: Finished difference Result 30752 states and 110074 transitions. [2022-03-03 19:30:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:30:27,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:28,017 INFO L225 Difference]: With dead ends: 30752 [2022-03-03 19:30:28,017 INFO L226 Difference]: Without dead ends: 30612 [2022-03-03 19:30:28,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=883, Invalid=2657, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 19:30:28,018 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 335 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:28,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 216 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:30:28,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30612 states. [2022-03-03 19:30:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30612 to 19275. [2022-03-03 19:30:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19275 states, 19274 states have (on average 3.6694510739856803) internal successors, (70725), 19274 states have internal predecessors, (70725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19275 states to 19275 states and 70725 transitions. [2022-03-03 19:30:28,482 INFO L78 Accepts]: Start accepts. Automaton has 19275 states and 70725 transitions. Word has length 23 [2022-03-03 19:30:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:28,482 INFO L470 AbstractCegarLoop]: Abstraction has 19275 states and 70725 transitions. [2022-03-03 19:30:28,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 19275 states and 70725 transitions. [2022-03-03 19:30:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:28,510 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:28,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:28,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:28,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:28,711 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:28,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:28,711 INFO L85 PathProgramCache]: Analyzing trace with hash -40815462, now seen corresponding path program 7 times [2022-03-03 19:30:28,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:28,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132525447] [2022-03-03 19:30:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:28,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:28,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132525447] [2022-03-03 19:30:28,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132525447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:28,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488912689] [2022-03-03 19:30:28,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:30:28,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:28,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:28,790 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:28,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:30:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:28,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:30:28,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:28,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:29,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488912689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:29,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:29,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:30:29,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213318543] [2022-03-03 19:30:29,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:29,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:30:29,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:29,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:30:29,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:30:29,197 INFO L87 Difference]: Start difference. First operand 19275 states and 70725 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:30,529 INFO L93 Difference]: Finished difference Result 26138 states and 93717 transitions. [2022-03-03 19:30:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:30:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:30,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:30,601 INFO L225 Difference]: With dead ends: 26138 [2022-03-03 19:30:30,601 INFO L226 Difference]: Without dead ends: 26054 [2022-03-03 19:30:30,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=577, Invalid=1775, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:30:30,602 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 347 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:30,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 145 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:30:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26054 states. [2022-03-03 19:30:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26054 to 19283. [2022-03-03 19:30:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19283 states, 19282 states have (on average 3.668395394668603) internal successors, (70734), 19282 states have internal predecessors, (70734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19283 states to 19283 states and 70734 transitions. [2022-03-03 19:30:31,009 INFO L78 Accepts]: Start accepts. Automaton has 19283 states and 70734 transitions. Word has length 23 [2022-03-03 19:30:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:31,009 INFO L470 AbstractCegarLoop]: Abstraction has 19283 states and 70734 transitions. [2022-03-03 19:30:31,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 19283 states and 70734 transitions. [2022-03-03 19:30:31,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:31,037 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:31,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:31,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:31,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-03 19:30:31,238 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:31,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:31,238 INFO L85 PathProgramCache]: Analyzing trace with hash 18908732, now seen corresponding path program 8 times [2022-03-03 19:30:31,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:31,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873756656] [2022-03-03 19:30:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:31,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:31,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:31,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873756656] [2022-03-03 19:30:31,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873756656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:31,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518106489] [2022-03-03 19:30:31,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:30:31,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:31,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:31,435 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:31,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:30:31,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:30:31,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:31,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:30:31,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:31,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:31,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518106489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:31,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:31,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:30:31,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377667799] [2022-03-03 19:30:31,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:31,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:30:31,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:30:31,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:30:31,847 INFO L87 Difference]: Start difference. First operand 19283 states and 70734 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:32,556 INFO L93 Difference]: Finished difference Result 24943 states and 90273 transitions. [2022-03-03 19:30:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:30:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:32,621 INFO L225 Difference]: With dead ends: 24943 [2022-03-03 19:30:32,622 INFO L226 Difference]: Without dead ends: 24663 [2022-03-03 19:30:32,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:30:32,622 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 172 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:32,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 156 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 568 Invalid, 0 Unknown, 177 Unchecked, 0.3s Time] [2022-03-03 19:30:32,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24663 states. [2022-03-03 19:30:32,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24663 to 19600. [2022-03-03 19:30:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19600 states, 19599 states have (on average 3.6688606561559265) internal successors, (71906), 19599 states have internal predecessors, (71906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19600 states to 19600 states and 71906 transitions. [2022-03-03 19:30:33,040 INFO L78 Accepts]: Start accepts. Automaton has 19600 states and 71906 transitions. Word has length 23 [2022-03-03 19:30:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:33,040 INFO L470 AbstractCegarLoop]: Abstraction has 19600 states and 71906 transitions. [2022-03-03 19:30:33,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 19600 states and 71906 transitions. [2022-03-03 19:30:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:33,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:33,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:33,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:33,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-03 19:30:33,267 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:33,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:33,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1523850184, now seen corresponding path program 9 times [2022-03-03 19:30:33,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:33,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387609798] [2022-03-03 19:30:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:33,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:33,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:33,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387609798] [2022-03-03 19:30:33,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387609798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:33,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112857972] [2022-03-03 19:30:33,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:30:33,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:33,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:33,344 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:33,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:30:33,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:30:33,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:33,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:30:33,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:33,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:33,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112857972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:33,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:33,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:30:33,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782262081] [2022-03-03 19:30:33,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:33,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:30:33,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:33,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:30:33,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:30:33,807 INFO L87 Difference]: Start difference. First operand 19600 states and 71906 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:34,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:34,509 INFO L93 Difference]: Finished difference Result 22433 states and 81186 transitions. [2022-03-03 19:30:34,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:30:34,511 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:34,567 INFO L225 Difference]: With dead ends: 22433 [2022-03-03 19:30:34,568 INFO L226 Difference]: Without dead ends: 22344 [2022-03-03 19:30:34,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:30:34,568 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 204 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:34,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 176 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 545 Invalid, 0 Unknown, 159 Unchecked, 0.3s Time] [2022-03-03 19:30:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22344 states. [2022-03-03 19:30:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22344 to 19686. [2022-03-03 19:30:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19686 states, 19685 states have (on average 3.6756413512827026) internal successors, (72355), 19685 states have internal predecessors, (72355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19686 states to 19686 states and 72355 transitions. [2022-03-03 19:30:34,955 INFO L78 Accepts]: Start accepts. Automaton has 19686 states and 72355 transitions. Word has length 23 [2022-03-03 19:30:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:34,955 INFO L470 AbstractCegarLoop]: Abstraction has 19686 states and 72355 transitions. [2022-03-03 19:30:34,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 19686 states and 72355 transitions. [2022-03-03 19:30:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:34,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:34,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:34,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-03 19:30:35,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-03 19:30:35,184 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:35,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:35,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1508260856, now seen corresponding path program 10 times [2022-03-03 19:30:35,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:35,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359539287] [2022-03-03 19:30:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:35,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:35,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:35,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359539287] [2022-03-03 19:30:35,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359539287] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:35,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501102039] [2022-03-03 19:30:35,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:30:35,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:35,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:35,280 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:35,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:30:35,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:30:35,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:35,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:30:35,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:35,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:35,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501102039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:35,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:35,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:30:35,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149247774] [2022-03-03 19:30:35,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:35,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:30:35,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:35,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:30:35,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:30:35,731 INFO L87 Difference]: Start difference. First operand 19686 states and 72355 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:36,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:36,438 INFO L93 Difference]: Finished difference Result 20917 states and 75946 transitions. [2022-03-03 19:30:36,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:30:36,439 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:36,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:36,489 INFO L225 Difference]: With dead ends: 20917 [2022-03-03 19:30:36,489 INFO L226 Difference]: Without dead ends: 20783 [2022-03-03 19:30:36,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:30:36,490 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 202 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:36,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 131 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 499 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-03-03 19:30:36,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20783 states. [2022-03-03 19:30:36,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20783 to 19749. [2022-03-03 19:30:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19749 states, 19748 states have (on average 3.675055701843225) internal successors, (72575), 19748 states have internal predecessors, (72575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19749 states to 19749 states and 72575 transitions. [2022-03-03 19:30:36,860 INFO L78 Accepts]: Start accepts. Automaton has 19749 states and 72575 transitions. Word has length 23 [2022-03-03 19:30:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:36,860 INFO L470 AbstractCegarLoop]: Abstraction has 19749 states and 72575 transitions. [2022-03-03 19:30:36,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 19749 states and 72575 transitions. [2022-03-03 19:30:36,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:36,888 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:36,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:36,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-03 19:30:37,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-03 19:30:37,089 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash 449096986, now seen corresponding path program 11 times [2022-03-03 19:30:37,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:37,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952802866] [2022-03-03 19:30:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:37,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:37,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:37,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952802866] [2022-03-03 19:30:37,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952802866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:37,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760964022] [2022-03-03 19:30:37,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:30:37,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:37,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:37,183 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:37,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:30:37,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:30:37,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:37,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:30:37,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:37,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:37,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760964022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:37,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:37,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-03 19:30:37,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866752359] [2022-03-03 19:30:37,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:37,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:30:37,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:30:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:30:37,662 INFO L87 Difference]: Start difference. First operand 19749 states and 72575 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:38,322 INFO L93 Difference]: Finished difference Result 24592 states and 89552 transitions. [2022-03-03 19:30:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:30:38,322 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:38,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:38,388 INFO L225 Difference]: With dead ends: 24592 [2022-03-03 19:30:38,388 INFO L226 Difference]: Without dead ends: 24408 [2022-03-03 19:30:38,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:30:38,389 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 125 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:38,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 221 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 681 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2022-03-03 19:30:38,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24408 states. [2022-03-03 19:30:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24408 to 19744. [2022-03-03 19:30:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19744 states, 19743 states have (on average 3.6747708048422227) internal successors, (72551), 19743 states have internal predecessors, (72551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19744 states to 19744 states and 72551 transitions. [2022-03-03 19:30:38,806 INFO L78 Accepts]: Start accepts. Automaton has 19744 states and 72551 transitions. Word has length 23 [2022-03-03 19:30:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:38,806 INFO L470 AbstractCegarLoop]: Abstraction has 19744 states and 72551 transitions. [2022-03-03 19:30:38,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 19744 states and 72551 transitions. [2022-03-03 19:30:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:38,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:38,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:38,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-03 19:30:39,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:39,037 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash 470852840, now seen corresponding path program 12 times [2022-03-03 19:30:39,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:39,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642211110] [2022-03-03 19:30:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:39,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:39,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642211110] [2022-03-03 19:30:39,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642211110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:39,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606894001] [2022-03-03 19:30:39,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:30:39,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:39,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:39,082 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:39,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:30:39,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:30:39,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:39,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 19:30:39,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:39,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:39,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606894001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:39,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:39,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-03-03 19:30:39,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958525036] [2022-03-03 19:30:39,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:39,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:30:39,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:39,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:30:39,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:30:39,367 INFO L87 Difference]: Start difference. First operand 19744 states and 72551 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:40,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:40,160 INFO L93 Difference]: Finished difference Result 26675 states and 95881 transitions. [2022-03-03 19:30:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:30:40,161 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:40,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:40,249 INFO L225 Difference]: With dead ends: 26675 [2022-03-03 19:30:40,249 INFO L226 Difference]: Without dead ends: 26613 [2022-03-03 19:30:40,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=416, Invalid=1476, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:30:40,250 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 305 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:40,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 210 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:30:40,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2022-03-03 19:30:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 20348. [2022-03-03 19:30:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20348 states, 20347 states have (on average 3.6653069248537866) internal successors, (74578), 20347 states have internal predecessors, (74578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:40,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20348 states to 20348 states and 74578 transitions. [2022-03-03 19:30:40,724 INFO L78 Accepts]: Start accepts. Automaton has 20348 states and 74578 transitions. Word has length 23 [2022-03-03 19:30:40,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:40,724 INFO L470 AbstractCegarLoop]: Abstraction has 20348 states and 74578 transitions. [2022-03-03 19:30:40,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 20348 states and 74578 transitions. [2022-03-03 19:30:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:40,755 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:40,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:40,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-03 19:30:40,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-03 19:30:40,955 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:40,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:40,955 INFO L85 PathProgramCache]: Analyzing trace with hash 328283496, now seen corresponding path program 13 times [2022-03-03 19:30:40,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:40,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071104866] [2022-03-03 19:30:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:40,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:41,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:41,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071104866] [2022-03-03 19:30:41,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071104866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:41,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611520165] [2022-03-03 19:30:41,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:30:41,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:41,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:41,005 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:41,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:30:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:41,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:30:41,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:41,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:41,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611520165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:41,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:41,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-03-03 19:30:41,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077408662] [2022-03-03 19:30:41,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:41,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:30:41,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:41,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:30:41,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:30:41,303 INFO L87 Difference]: Start difference. First operand 20348 states and 74578 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:42,808 INFO L93 Difference]: Finished difference Result 49018 states and 178154 transitions. [2022-03-03 19:30:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:30:42,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:42,976 INFO L225 Difference]: With dead ends: 49018 [2022-03-03 19:30:42,976 INFO L226 Difference]: Without dead ends: 49000 [2022-03-03 19:30:42,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=914, Invalid=2746, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:30:42,977 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 468 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:42,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 227 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:30:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49000 states. [2022-03-03 19:30:43,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49000 to 29431. [2022-03-03 19:30:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29431 states, 29430 states have (on average 3.6643221202854233) internal successors, (107841), 29430 states have internal predecessors, (107841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29431 states to 29431 states and 107841 transitions. [2022-03-03 19:30:43,823 INFO L78 Accepts]: Start accepts. Automaton has 29431 states and 107841 transitions. Word has length 23 [2022-03-03 19:30:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:43,823 INFO L470 AbstractCegarLoop]: Abstraction has 29431 states and 107841 transitions. [2022-03-03 19:30:43,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 29431 states and 107841 transitions. [2022-03-03 19:30:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:43,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:43,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:43,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-03 19:30:44,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-03 19:30:44,075 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:44,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:44,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1368451066, now seen corresponding path program 14 times [2022-03-03 19:30:44,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:44,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409636720] [2022-03-03 19:30:44,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:44,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:44,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:44,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409636720] [2022-03-03 19:30:44,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409636720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:44,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078821305] [2022-03-03 19:30:44,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:30:44,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:44,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:44,130 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:44,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:30:44,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:30:44,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:30:44,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:44,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:44,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078821305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:44,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:44,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-03-03 19:30:44,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718104896] [2022-03-03 19:30:44,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:44,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:30:44,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:30:44,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:30:44,409 INFO L87 Difference]: Start difference. First operand 29431 states and 107841 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:45,492 INFO L93 Difference]: Finished difference Result 40726 states and 147311 transitions. [2022-03-03 19:30:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:30:45,492 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:45,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:45,610 INFO L225 Difference]: With dead ends: 40726 [2022-03-03 19:30:45,610 INFO L226 Difference]: Without dead ends: 40718 [2022-03-03 19:30:45,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=655, Invalid=2101, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:30:45,611 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 353 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:45,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 286 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:30:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40718 states. [2022-03-03 19:30:46,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40718 to 29455. [2022-03-03 19:30:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29455 states, 29454 states have (on average 3.6647653968900658) internal successors, (107942), 29454 states have internal predecessors, (107942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29455 states to 29455 states and 107942 transitions. [2022-03-03 19:30:46,367 INFO L78 Accepts]: Start accepts. Automaton has 29455 states and 107942 transitions. Word has length 23 [2022-03-03 19:30:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:46,367 INFO L470 AbstractCegarLoop]: Abstraction has 29455 states and 107942 transitions. [2022-03-03 19:30:46,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 29455 states and 107942 transitions. [2022-03-03 19:30:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:46,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:46,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:46,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:46,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-03 19:30:46,615 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:46,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:46,615 INFO L85 PathProgramCache]: Analyzing trace with hash 545416052, now seen corresponding path program 15 times [2022-03-03 19:30:46,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:46,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999812967] [2022-03-03 19:30:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:46,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:46,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:46,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999812967] [2022-03-03 19:30:46,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999812967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:46,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280377269] [2022-03-03 19:30:46,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:30:46,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:46,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:46,680 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:46,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:30:46,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:30:46,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:46,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:30:46,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:46,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:46,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280377269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:46,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:46,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-03-03 19:30:46,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040161559] [2022-03-03 19:30:46,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:46,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:30:46,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:46,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:30:46,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:30:46,999 INFO L87 Difference]: Start difference. First operand 29455 states and 107942 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:48,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:48,748 INFO L93 Difference]: Finished difference Result 54419 states and 194123 transitions. [2022-03-03 19:30:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:30:48,749 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:48,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:48,948 INFO L225 Difference]: With dead ends: 54419 [2022-03-03 19:30:48,948 INFO L226 Difference]: Without dead ends: 54419 [2022-03-03 19:30:48,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=963, Invalid=2343, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 19:30:48,949 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 407 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:48,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 190 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:30:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54419 states. [2022-03-03 19:30:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54419 to 31116. [2022-03-03 19:30:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31116 states, 31115 states have (on average 3.6714767796882533) internal successors, (114238), 31115 states have internal predecessors, (114238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31116 states to 31116 states and 114238 transitions. [2022-03-03 19:30:50,034 INFO L78 Accepts]: Start accepts. Automaton has 31116 states and 114238 transitions. Word has length 23 [2022-03-03 19:30:50,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:50,034 INFO L470 AbstractCegarLoop]: Abstraction has 31116 states and 114238 transitions. [2022-03-03 19:30:50,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:50,034 INFO L276 IsEmpty]: Start isEmpty. Operand 31116 states and 114238 transitions. [2022-03-03 19:30:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:50,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:50,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:50,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:50,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:50,291 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1796586428, now seen corresponding path program 16 times [2022-03-03 19:30:50,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:50,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558144828] [2022-03-03 19:30:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:50,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:50,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:50,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558144828] [2022-03-03 19:30:50,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558144828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:50,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665186889] [2022-03-03 19:30:50,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:30:50,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:50,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:50,347 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:50,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:30:50,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:30:50,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:50,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:30:50,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:50,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:50,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665186889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:50,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:50,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-03-03 19:30:50,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565409813] [2022-03-03 19:30:50,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:50,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:30:50,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:50,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:30:50,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:30:50,633 INFO L87 Difference]: Start difference. First operand 31116 states and 114238 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:52,383 INFO L93 Difference]: Finished difference Result 81071 states and 296560 transitions. [2022-03-03 19:30:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:30:52,383 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:52,824 INFO L225 Difference]: With dead ends: 81071 [2022-03-03 19:30:52,824 INFO L226 Difference]: Without dead ends: 81043 [2022-03-03 19:30:52,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2560, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 19:30:52,825 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 540 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:52,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 203 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:30:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81043 states. [2022-03-03 19:30:54,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81043 to 48981. [2022-03-03 19:30:54,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48981 states, 48980 states have (on average 3.6829726418946507) internal successors, (180392), 48980 states have internal predecessors, (180392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48981 states to 48981 states and 180392 transitions. [2022-03-03 19:30:54,317 INFO L78 Accepts]: Start accepts. Automaton has 48981 states and 180392 transitions. Word has length 23 [2022-03-03 19:30:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:54,317 INFO L470 AbstractCegarLoop]: Abstraction has 48981 states and 180392 transitions. [2022-03-03 19:30:54,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 48981 states and 180392 transitions. [2022-03-03 19:30:54,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:54,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:54,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:54,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:54,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:54,783 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:54,784 INFO L85 PathProgramCache]: Analyzing trace with hash 99851866, now seen corresponding path program 17 times [2022-03-03 19:30:54,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:54,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58573407] [2022-03-03 19:30:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:54,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:54,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:54,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58573407] [2022-03-03 19:30:54,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58573407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:54,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808747161] [2022-03-03 19:30:54,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:30:54,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:54,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:54,851 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:54,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:30:54,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:30:54,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:54,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:30:54,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:54,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:55,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808747161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:55,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:55,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-03-03 19:30:55,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521122294] [2022-03-03 19:30:55,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:55,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:30:55,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:30:55,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:30:55,103 INFO L87 Difference]: Start difference. First operand 48981 states and 180392 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:56,407 INFO L93 Difference]: Finished difference Result 69282 states and 253017 transitions. [2022-03-03 19:30:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 19:30:56,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:56,684 INFO L225 Difference]: With dead ends: 69282 [2022-03-03 19:30:56,684 INFO L226 Difference]: Without dead ends: 69262 [2022-03-03 19:30:56,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:30:56,685 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 305 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:56,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 252 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:30:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69262 states. [2022-03-03 19:30:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69262 to 48988. [2022-03-03 19:30:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48988 states, 48987 states have (on average 3.6832220793271686) internal successors, (180430), 48987 states have internal predecessors, (180430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48988 states to 48988 states and 180430 transitions. [2022-03-03 19:30:58,227 INFO L78 Accepts]: Start accepts. Automaton has 48988 states and 180430 transitions. Word has length 23 [2022-03-03 19:30:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:30:58,227 INFO L470 AbstractCegarLoop]: Abstraction has 48988 states and 180430 transitions. [2022-03-03 19:30:58,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 48988 states and 180430 transitions. [2022-03-03 19:30:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:30:58,460 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:30:58,460 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:30:58,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 19:30:58,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:58,676 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:30:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:30:58,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1945857750, now seen corresponding path program 15 times [2022-03-03 19:30:58,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:30:58,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664282820] [2022-03-03 19:30:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:30:58,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:30:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:30:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:58,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:30:58,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664282820] [2022-03-03 19:30:58,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664282820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:30:58,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388155952] [2022-03-03 19:30:58,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:30:58,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:30:58,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:30:58,700 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:30:58,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:30:58,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:30:58,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:30:58,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:30:58,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:30:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:58,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:30:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:30:58,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388155952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:30:58,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:30:58,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-03 19:30:58,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135984185] [2022-03-03 19:30:58,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:30:58,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:30:58,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:30:58,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:30:58,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:30:58,906 INFO L87 Difference]: Start difference. First operand 48988 states and 180430 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:30:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:30:59,593 INFO L93 Difference]: Finished difference Result 51481 states and 188036 transitions. [2022-03-03 19:30:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:30:59,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:30:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:30:59,920 INFO L225 Difference]: With dead ends: 51481 [2022-03-03 19:30:59,920 INFO L226 Difference]: Without dead ends: 51425 [2022-03-03 19:30:59,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:30:59,921 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 280 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:30:59,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 132 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:30:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51425 states. [2022-03-03 19:31:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51425 to 49350. [2022-03-03 19:31:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49350 states, 49349 states have (on average 3.682404911953636) internal successors, (181723), 49349 states have internal predecessors, (181723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49350 states to 49350 states and 181723 transitions. [2022-03-03 19:31:01,109 INFO L78 Accepts]: Start accepts. Automaton has 49350 states and 181723 transitions. Word has length 23 [2022-03-03 19:31:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:01,109 INFO L470 AbstractCegarLoop]: Abstraction has 49350 states and 181723 transitions. [2022-03-03 19:31:01,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 49350 states and 181723 transitions. [2022-03-03 19:31:01,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:01,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:01,175 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:01,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:01,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-03 19:31:01,376 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2072733398, now seen corresponding path program 16 times [2022-03-03 19:31:01,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:01,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875316085] [2022-03-03 19:31:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:01,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:01,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:01,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875316085] [2022-03-03 19:31:01,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875316085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:01,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249967738] [2022-03-03 19:31:01,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:31:01,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:01,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:01,404 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:01,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 19:31:01,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:31:01,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:31:01,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:01,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:01,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249967738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:01,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:01,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-03 19:31:01,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184607495] [2022-03-03 19:31:01,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:01,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:31:01,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:01,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:31:01,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:31:01,785 INFO L87 Difference]: Start difference. First operand 49350 states and 181723 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:02,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:02,462 INFO L93 Difference]: Finished difference Result 50955 states and 186662 transitions. [2022-03-03 19:31:02,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:31:02,464 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:02,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:02,814 INFO L225 Difference]: With dead ends: 50955 [2022-03-03 19:31:02,814 INFO L226 Difference]: Without dead ends: 50937 [2022-03-03 19:31:02,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:31:02,814 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 192 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:02,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 130 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:31:02,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50937 states. [2022-03-03 19:31:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50937 to 49260. [2022-03-03 19:31:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49260 states, 49259 states have (on average 3.6830426927059015) internal successors, (181423), 49259 states have internal predecessors, (181423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49260 states to 49260 states and 181423 transitions. [2022-03-03 19:31:04,044 INFO L78 Accepts]: Start accepts. Automaton has 49260 states and 181423 transitions. Word has length 23 [2022-03-03 19:31:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:04,044 INFO L470 AbstractCegarLoop]: Abstraction has 49260 states and 181423 transitions. [2022-03-03 19:31:04,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 49260 states and 181423 transitions. [2022-03-03 19:31:04,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:04,110 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:04,110 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:04,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:04,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-03 19:31:04,310 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:04,311 INFO L85 PathProgramCache]: Analyzing trace with hash 385959470, now seen corresponding path program 17 times [2022-03-03 19:31:04,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:04,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252202482] [2022-03-03 19:31:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:04,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:04,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:04,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252202482] [2022-03-03 19:31:04,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252202482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:04,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299918833] [2022-03-03 19:31:04,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:31:04,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:04,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:04,345 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:04,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 19:31:04,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:31:04,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:04,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:31:04,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:04,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:04,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299918833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:04,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:04,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-03 19:31:04,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999713410] [2022-03-03 19:31:04,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:04,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:31:04,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:04,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:31:04,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:31:04,522 INFO L87 Difference]: Start difference. First operand 49260 states and 181423 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:05,269 INFO L93 Difference]: Finished difference Result 50587 states and 185637 transitions. [2022-03-03 19:31:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:31:05,270 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:05,455 INFO L225 Difference]: With dead ends: 50587 [2022-03-03 19:31:05,455 INFO L226 Difference]: Without dead ends: 50502 [2022-03-03 19:31:05,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=457, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:31:05,456 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 168 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:05,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 73 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:31:05,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50502 states. [2022-03-03 19:31:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50502 to 49092. [2022-03-03 19:31:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49092 states, 49091 states have (on average 3.684870953942678) internal successors, (180894), 49091 states have internal predecessors, (180894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49092 states to 49092 states and 180894 transitions. [2022-03-03 19:31:06,769 INFO L78 Accepts]: Start accepts. Automaton has 49092 states and 180894 transitions. Word has length 23 [2022-03-03 19:31:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:06,771 INFO L470 AbstractCegarLoop]: Abstraction has 49092 states and 180894 transitions. [2022-03-03 19:31:06,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 49092 states and 180894 transitions. [2022-03-03 19:31:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:06,835 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:06,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:06,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:07,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-03 19:31:07,051 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:07,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:07,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1274385134, now seen corresponding path program 18 times [2022-03-03 19:31:07,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:07,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14950535] [2022-03-03 19:31:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:07,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:07,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:07,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14950535] [2022-03-03 19:31:07,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14950535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:07,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741128685] [2022-03-03 19:31:07,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:31:07,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:07,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:07,076 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:07,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 19:31:07,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:31:07,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:07,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:31:07,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:07,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:07,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741128685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:07,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:07,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-03 19:31:07,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277971715] [2022-03-03 19:31:07,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:07,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:31:07,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:07,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:31:07,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:31:07,278 INFO L87 Difference]: Start difference. First operand 49092 states and 180894 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:08,094 INFO L93 Difference]: Finished difference Result 51022 states and 186831 transitions. [2022-03-03 19:31:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:31:08,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:08,283 INFO L225 Difference]: With dead ends: 51022 [2022-03-03 19:31:08,283 INFO L226 Difference]: Without dead ends: 50982 [2022-03-03 19:31:08,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:31:08,283 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 167 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:08,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 145 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:31:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50982 states. [2022-03-03 19:31:09,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50982 to 49178. [2022-03-03 19:31:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49178 states, 49177 states have (on average 3.6849340138682716) internal successors, (181214), 49177 states have internal predecessors, (181214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49178 states to 49178 states and 181214 transitions. [2022-03-03 19:31:09,557 INFO L78 Accepts]: Start accepts. Automaton has 49178 states and 181214 transitions. Word has length 23 [2022-03-03 19:31:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:09,557 INFO L470 AbstractCegarLoop]: Abstraction has 49178 states and 181214 transitions. [2022-03-03 19:31:09,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 49178 states and 181214 transitions. [2022-03-03 19:31:09,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:09,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:09,820 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:09,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-03 19:31:10,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-03 19:31:10,026 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:10,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:10,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1147509486, now seen corresponding path program 19 times [2022-03-03 19:31:10,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:10,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092695791] [2022-03-03 19:31:10,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:10,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:10,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:10,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092695791] [2022-03-03 19:31:10,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092695791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:10,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843228358] [2022-03-03 19:31:10,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:31:10,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:10,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:10,051 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:10,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 19:31:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:10,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:31:10,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:10,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:10,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843228358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:10,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:10,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-03 19:31:10,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972561647] [2022-03-03 19:31:10,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:10,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:31:10,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:10,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:31:10,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:31:10,247 INFO L87 Difference]: Start difference. First operand 49178 states and 181214 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:10,798 INFO L93 Difference]: Finished difference Result 50540 states and 185579 transitions. [2022-03-03 19:31:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:31:10,798 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:11,162 INFO L225 Difference]: With dead ends: 50540 [2022-03-03 19:31:11,163 INFO L226 Difference]: Without dead ends: 50527 [2022-03-03 19:31:11,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:31:11,163 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 129 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:11,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 83 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:31:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50527 states. [2022-03-03 19:31:12,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50527 to 49172. [2022-03-03 19:31:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49172 states, 49171 states have (on average 3.6848142197636817) internal successors, (181186), 49171 states have internal predecessors, (181186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49172 states to 49172 states and 181186 transitions. [2022-03-03 19:31:12,412 INFO L78 Accepts]: Start accepts. Automaton has 49172 states and 181186 transitions. Word has length 23 [2022-03-03 19:31:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:12,412 INFO L470 AbstractCegarLoop]: Abstraction has 49172 states and 181186 transitions. [2022-03-03 19:31:12,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 49172 states and 181186 transitions. [2022-03-03 19:31:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:12,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:12,478 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:12,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:12,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-03 19:31:12,678 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:12,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1508650798, now seen corresponding path program 20 times [2022-03-03 19:31:12,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:12,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234741435] [2022-03-03 19:31:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:12,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:12,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:12,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234741435] [2022-03-03 19:31:12,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234741435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:12,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861888438] [2022-03-03 19:31:12,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:31:12,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:12,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:12,708 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:12,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 19:31:12,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:31:12,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:12,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:31:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:12,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:12,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861888438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:12,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:12,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-03 19:31:12,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96597025] [2022-03-03 19:31:12,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:12,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:31:12,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:12,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:31:12,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:31:12,906 INFO L87 Difference]: Start difference. First operand 49172 states and 181186 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:13,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:13,671 INFO L93 Difference]: Finished difference Result 50754 states and 186141 transitions. [2022-03-03 19:31:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:31:13,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:13,842 INFO L225 Difference]: With dead ends: 50754 [2022-03-03 19:31:13,842 INFO L226 Difference]: Without dead ends: 50754 [2022-03-03 19:31:13,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=296, Invalid=634, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:31:13,843 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 114 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:13,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 123 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:31:13,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50754 states. [2022-03-03 19:31:14,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50754 to 49168. [2022-03-03 19:31:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49168 states, 49167 states have (on average 3.6840563792787844) internal successors, (181134), 49167 states have internal predecessors, (181134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49168 states to 49168 states and 181134 transitions. [2022-03-03 19:31:15,171 INFO L78 Accepts]: Start accepts. Automaton has 49168 states and 181134 transitions. Word has length 23 [2022-03-03 19:31:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:15,171 INFO L470 AbstractCegarLoop]: Abstraction has 49168 states and 181134 transitions. [2022-03-03 19:31:15,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 49168 states and 181134 transitions. [2022-03-03 19:31:15,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:15,238 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:15,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:15,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:15,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-03 19:31:15,439 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:15,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2041659458, now seen corresponding path program 18 times [2022-03-03 19:31:15,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:15,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171594268] [2022-03-03 19:31:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:15,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:15,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:15,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171594268] [2022-03-03 19:31:15,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171594268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:15,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865738176] [2022-03-03 19:31:15,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:31:15,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:15,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:15,508 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:15,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 19:31:15,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:31:15,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:15,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:31:15,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:15,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:16,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865738176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:16,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:16,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:31:16,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297563665] [2022-03-03 19:31:16,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:16,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:31:16,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:16,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:31:16,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:31:16,074 INFO L87 Difference]: Start difference. First operand 49168 states and 181134 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:17,630 INFO L93 Difference]: Finished difference Result 64396 states and 235136 transitions. [2022-03-03 19:31:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:31:17,631 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:17,851 INFO L225 Difference]: With dead ends: 64396 [2022-03-03 19:31:17,851 INFO L226 Difference]: Without dead ends: 64052 [2022-03-03 19:31:17,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=1611, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:31:17,852 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 335 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:17,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 200 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 715 Invalid, 0 Unknown, 156 Unchecked, 0.4s Time] [2022-03-03 19:31:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64052 states. [2022-03-03 19:31:18,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64052 to 49946. [2022-03-03 19:31:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49946 states, 49945 states have (on average 3.6853138452297527) internal successors, (184063), 49945 states have internal predecessors, (184063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49946 states to 49946 states and 184063 transitions. [2022-03-03 19:31:19,230 INFO L78 Accepts]: Start accepts. Automaton has 49946 states and 184063 transitions. Word has length 23 [2022-03-03 19:31:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:19,231 INFO L470 AbstractCegarLoop]: Abstraction has 49946 states and 184063 transitions. [2022-03-03 19:31:19,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 49946 states and 184063 transitions. [2022-03-03 19:31:19,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:19,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:19,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:19,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-03 19:31:19,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:19,497 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:19,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:19,498 INFO L85 PathProgramCache]: Analyzing trace with hash 498900542, now seen corresponding path program 19 times [2022-03-03 19:31:19,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:19,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162620361] [2022-03-03 19:31:19,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:19,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:19,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:19,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162620361] [2022-03-03 19:31:19,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162620361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:19,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190231172] [2022-03-03 19:31:19,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:31:19,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:19,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:19,579 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:19,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 19:31:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:19,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:31:19,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:19,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:20,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190231172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:20,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:20,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:31:20,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36569191] [2022-03-03 19:31:20,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:20,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:31:20,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:20,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:31:20,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:31:20,183 INFO L87 Difference]: Start difference. First operand 49946 states and 184063 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:22,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:22,314 INFO L93 Difference]: Finished difference Result 54689 states and 198839 transitions. [2022-03-03 19:31:22,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:31:22,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:22,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:22,564 INFO L225 Difference]: With dead ends: 54689 [2022-03-03 19:31:22,565 INFO L226 Difference]: Without dead ends: 54301 [2022-03-03 19:31:22,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=914, Invalid=2626, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 19:31:22,565 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 329 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:22,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 334 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 988 Invalid, 0 Unknown, 183 Unchecked, 0.5s Time] [2022-03-03 19:31:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54301 states. [2022-03-03 19:31:23,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54301 to 49927. [2022-03-03 19:31:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49927 states, 49926 states have (on average 3.6852341465368745) internal successors, (183989), 49926 states have internal predecessors, (183989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:24,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49927 states to 49927 states and 183989 transitions. [2022-03-03 19:31:24,005 INFO L78 Accepts]: Start accepts. Automaton has 49927 states and 183989 transitions. Word has length 23 [2022-03-03 19:31:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:24,005 INFO L470 AbstractCegarLoop]: Abstraction has 49927 states and 183989 transitions. [2022-03-03 19:31:24,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand 49927 states and 183989 transitions. [2022-03-03 19:31:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:24,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:24,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:24,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:24,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:24,270 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash -763955714, now seen corresponding path program 20 times [2022-03-03 19:31:24,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:24,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631682662] [2022-03-03 19:31:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:24,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:24,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:24,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631682662] [2022-03-03 19:31:24,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631682662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:24,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470966925] [2022-03-03 19:31:24,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:31:24,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:24,352 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:24,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 19:31:24,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:31:24,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:24,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:31:24,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:24,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:24,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470966925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:24,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:24,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:31:24,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272477440] [2022-03-03 19:31:24,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:24,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:31:24,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:24,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:31:24,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:31:24,945 INFO L87 Difference]: Start difference. First operand 49927 states and 183989 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:26,719 INFO L93 Difference]: Finished difference Result 52898 states and 192993 transitions. [2022-03-03 19:31:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:31:26,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:26,895 INFO L225 Difference]: With dead ends: 52898 [2022-03-03 19:31:26,895 INFO L226 Difference]: Without dead ends: 52535 [2022-03-03 19:31:26,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=613, Invalid=1937, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 19:31:26,896 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 245 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:26,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 302 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 929 Invalid, 0 Unknown, 82 Unchecked, 0.4s Time] [2022-03-03 19:31:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52535 states. [2022-03-03 19:31:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52535 to 50150. [2022-03-03 19:31:27,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50150 states, 50149 states have (on average 3.685397515404096) internal successors, (184819), 50149 states have internal predecessors, (184819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50150 states to 50150 states and 184819 transitions. [2022-03-03 19:31:28,149 INFO L78 Accepts]: Start accepts. Automaton has 50150 states and 184819 transitions. Word has length 23 [2022-03-03 19:31:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:28,150 INFO L470 AbstractCegarLoop]: Abstraction has 50150 states and 184819 transitions. [2022-03-03 19:31:28,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:28,150 INFO L276 IsEmpty]: Start isEmpty. Operand 50150 states and 184819 transitions. [2022-03-03 19:31:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:28,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:28,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:28,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:28,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:28,413 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:28,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1823119584, now seen corresponding path program 21 times [2022-03-03 19:31:28,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:28,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343702948] [2022-03-03 19:31:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:28,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:28,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:28,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343702948] [2022-03-03 19:31:28,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343702948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:28,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351209843] [2022-03-03 19:31:28,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:31:28,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:28,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:28,514 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:28,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 19:31:28,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:31:28,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:28,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:31:28,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:28,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:29,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351209843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:29,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:29,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-03 19:31:29,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634291018] [2022-03-03 19:31:29,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:29,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:31:29,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:29,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:31:29,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:31:29,119 INFO L87 Difference]: Start difference. First operand 50150 states and 184819 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:30,569 INFO L93 Difference]: Finished difference Result 64329 states and 235588 transitions. [2022-03-03 19:31:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:31:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:30,783 INFO L225 Difference]: With dead ends: 64329 [2022-03-03 19:31:30,783 INFO L226 Difference]: Without dead ends: 64063 [2022-03-03 19:31:30,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=1401, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:31:30,784 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 213 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:30,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 305 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 921 Invalid, 0 Unknown, 129 Unchecked, 0.4s Time] [2022-03-03 19:31:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64063 states. [2022-03-03 19:31:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64063 to 50291. [2022-03-03 19:31:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50291 states, 50290 states have (on average 3.6863591171206997) internal successors, (185387), 50290 states have internal predecessors, (185387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50291 states to 50291 states and 185387 transitions. [2022-03-03 19:31:32,150 INFO L78 Accepts]: Start accepts. Automaton has 50291 states and 185387 transitions. Word has length 23 [2022-03-03 19:31:32,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:32,150 INFO L470 AbstractCegarLoop]: Abstraction has 50291 states and 185387 transitions. [2022-03-03 19:31:32,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 50291 states and 185387 transitions. [2022-03-03 19:31:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:32,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:32,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:32,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:32,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-03 19:31:32,423 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:32,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1052604350, now seen corresponding path program 22 times [2022-03-03 19:31:32,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:32,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983767398] [2022-03-03 19:31:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:32,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:32,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:32,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983767398] [2022-03-03 19:31:32,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983767398] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:32,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172994539] [2022-03-03 19:31:32,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:31:32,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:32,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:32,505 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:32,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 19:31:32,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:31:32,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:32,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:31:32,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:32,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:32,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172994539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:32,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:32,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:31:32,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735026619] [2022-03-03 19:31:32,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:32,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:31:32,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:32,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:31:32,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:31:32,889 INFO L87 Difference]: Start difference. First operand 50291 states and 185387 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:34,430 INFO L93 Difference]: Finished difference Result 54198 states and 198484 transitions. [2022-03-03 19:31:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:31:34,430 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:34,757 INFO L225 Difference]: With dead ends: 54198 [2022-03-03 19:31:34,757 INFO L226 Difference]: Without dead ends: 53891 [2022-03-03 19:31:34,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=522, Invalid=1548, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:31:34,757 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 231 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:34,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 215 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 723 Invalid, 0 Unknown, 127 Unchecked, 0.5s Time] [2022-03-03 19:31:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53891 states. [2022-03-03 19:31:35,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53891 to 50627. [2022-03-03 19:31:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50627 states, 50626 states have (on average 3.6878876466637696) internal successors, (186703), 50626 states have internal predecessors, (186703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50627 states to 50627 states and 186703 transitions. [2022-03-03 19:31:36,071 INFO L78 Accepts]: Start accepts. Automaton has 50627 states and 186703 transitions. Word has length 23 [2022-03-03 19:31:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:36,071 INFO L470 AbstractCegarLoop]: Abstraction has 50627 states and 186703 transitions. [2022-03-03 19:31:36,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 50627 states and 186703 transitions. [2022-03-03 19:31:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:36,140 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:36,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:36,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-03 19:31:36,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-03-03 19:31:36,342 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:36,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2111768220, now seen corresponding path program 23 times [2022-03-03 19:31:36,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:36,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210571925] [2022-03-03 19:31:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:36,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:36,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:36,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210571925] [2022-03-03 19:31:36,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210571925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:36,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313734477] [2022-03-03 19:31:36,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:31:36,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:36,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:36,454 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:36,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 19:31:36,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:31:36,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:36,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:31:36,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:36,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:36,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313734477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:36,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:36,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-03 19:31:36,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549848256] [2022-03-03 19:31:36,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:36,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:31:36,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:31:36,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:31:36,887 INFO L87 Difference]: Start difference. First operand 50627 states and 186703 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:38,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:38,094 INFO L93 Difference]: Finished difference Result 63055 states and 232764 transitions. [2022-03-03 19:31:38,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:31:38,095 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:38,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:38,328 INFO L225 Difference]: With dead ends: 63055 [2022-03-03 19:31:38,328 INFO L226 Difference]: Without dead ends: 62953 [2022-03-03 19:31:38,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:31:38,328 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 203 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:38,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 163 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 580 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2022-03-03 19:31:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62953 states. [2022-03-03 19:31:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62953 to 50622. [2022-03-03 19:31:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50622 states, 50621 states have (on average 3.687856818316509) internal successors, (186683), 50621 states have internal predecessors, (186683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50622 states to 50622 states and 186683 transitions. [2022-03-03 19:31:39,698 INFO L78 Accepts]: Start accepts. Automaton has 50622 states and 186683 transitions. Word has length 23 [2022-03-03 19:31:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:39,699 INFO L470 AbstractCegarLoop]: Abstraction has 50622 states and 186683 transitions. [2022-03-03 19:31:39,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 50622 states and 186683 transitions. [2022-03-03 19:31:39,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:39,765 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:39,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:39,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-03 19:31:39,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:39,965 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:39,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:39,966 INFO L85 PathProgramCache]: Analyzing trace with hash 365651024, now seen corresponding path program 24 times [2022-03-03 19:31:39,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:39,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732374822] [2022-03-03 19:31:39,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:39,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:31:40,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:40,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732374822] [2022-03-03 19:31:40,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732374822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:40,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908292763] [2022-03-03 19:31:40,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:31:40,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:40,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:40,040 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:40,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 19:31:40,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:31:40,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:40,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 19:31:40,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:40,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:40,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908292763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:40,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:40,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2022-03-03 19:31:40,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39339142] [2022-03-03 19:31:40,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:40,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:31:40,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:40,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:31:40,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:31:40,525 INFO L87 Difference]: Start difference. First operand 50622 states and 186683 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:42,233 INFO L93 Difference]: Finished difference Result 74584 states and 272486 transitions. [2022-03-03 19:31:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 19:31:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:42,500 INFO L225 Difference]: With dead ends: 74584 [2022-03-03 19:31:42,500 INFO L226 Difference]: Without dead ends: 74568 [2022-03-03 19:31:42,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=753, Invalid=3029, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:31:42,501 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 419 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:42,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 292 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:31:42,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74568 states. [2022-03-03 19:31:43,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74568 to 50705. [2022-03-03 19:31:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50705 states, 50704 states have (on average 3.688407226254339) internal successors, (187017), 50704 states have internal predecessors, (187017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:44,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50705 states to 50705 states and 187017 transitions. [2022-03-03 19:31:44,235 INFO L78 Accepts]: Start accepts. Automaton has 50705 states and 187017 transitions. Word has length 23 [2022-03-03 19:31:44,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:44,235 INFO L470 AbstractCegarLoop]: Abstraction has 50705 states and 187017 transitions. [2022-03-03 19:31:44,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:44,236 INFO L276 IsEmpty]: Start isEmpty. Operand 50705 states and 187017 transitions. [2022-03-03 19:31:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:44,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:44,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:44,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:44,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:44,520 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:44,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1122420986, now seen corresponding path program 25 times [2022-03-03 19:31:44,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:44,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280447920] [2022-03-03 19:31:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:44,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:44,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:44,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280447920] [2022-03-03 19:31:44,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280447920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:44,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153347705] [2022-03-03 19:31:44,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:31:44,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:44,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:44,622 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:44,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 19:31:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:44,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-03 19:31:44,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:44,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:45,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153347705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:45,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:45,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-03 19:31:45,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812349235] [2022-03-03 19:31:45,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:45,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:31:45,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:45,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:31:45,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:31:45,007 INFO L87 Difference]: Start difference. First operand 50705 states and 187017 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:45,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:45,944 INFO L93 Difference]: Finished difference Result 53238 states and 195578 transitions. [2022-03-03 19:31:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:31:45,945 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:45,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:46,136 INFO L225 Difference]: With dead ends: 53238 [2022-03-03 19:31:46,136 INFO L226 Difference]: Without dead ends: 53080 [2022-03-03 19:31:46,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:31:46,137 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:46,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 125 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 534 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-03-03 19:31:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53080 states. [2022-03-03 19:31:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53080 to 50820. [2022-03-03 19:31:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50820 states, 50819 states have (on average 3.6885023318050334) internal successors, (187446), 50819 states have internal predecessors, (187446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50820 states to 50820 states and 187446 transitions. [2022-03-03 19:31:47,447 INFO L78 Accepts]: Start accepts. Automaton has 50820 states and 187446 transitions. Word has length 23 [2022-03-03 19:31:47,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:47,447 INFO L470 AbstractCegarLoop]: Abstraction has 50820 states and 187446 transitions. [2022-03-03 19:31:47,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 50820 states and 187446 transitions. [2022-03-03 19:31:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:47,517 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:47,517 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:47,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-03 19:31:47,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-03 19:31:47,719 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:47,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:47,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1254398970, now seen corresponding path program 17 times [2022-03-03 19:31:47,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:47,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223132313] [2022-03-03 19:31:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:47,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:47,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:47,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223132313] [2022-03-03 19:31:47,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223132313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:47,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064017601] [2022-03-03 19:31:47,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:31:47,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:47,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:47,784 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:47,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 19:31:47,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:31:47,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:47,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:31:47,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:31:47,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:31:48,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064017601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:48,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:48,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-03-03 19:31:48,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282762680] [2022-03-03 19:31:48,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:48,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:31:48,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:48,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:31:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:31:48,054 INFO L87 Difference]: Start difference. First operand 50820 states and 187446 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:48,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:48,623 INFO L93 Difference]: Finished difference Result 51214 states and 188578 transitions. [2022-03-03 19:31:48,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:31:48,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:48,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:48,810 INFO L225 Difference]: With dead ends: 51214 [2022-03-03 19:31:48,810 INFO L226 Difference]: Without dead ends: 51141 [2022-03-03 19:31:48,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:31:48,810 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 49 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:48,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 218 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:31:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51141 states. [2022-03-03 19:31:49,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51141 to 50768. [2022-03-03 19:31:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50768 states, 50767 states have (on average 3.688262059999606) internal successors, (187242), 50767 states have internal predecessors, (187242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50768 states to 50768 states and 187242 transitions. [2022-03-03 19:31:50,123 INFO L78 Accepts]: Start accepts. Automaton has 50768 states and 187242 transitions. Word has length 23 [2022-03-03 19:31:50,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:50,123 INFO L470 AbstractCegarLoop]: Abstraction has 50768 states and 187242 transitions. [2022-03-03 19:31:50,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 50768 states and 187242 transitions. [2022-03-03 19:31:50,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:50,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:50,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:50,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:50,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-03 19:31:50,397 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:50,397 INFO L85 PathProgramCache]: Analyzing trace with hash -97569618, now seen corresponding path program 18 times [2022-03-03 19:31:50,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:50,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724442528] [2022-03-03 19:31:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:50,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:31:50,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:50,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724442528] [2022-03-03 19:31:50,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724442528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:50,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181652069] [2022-03-03 19:31:50,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:31:50,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:50,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:50,451 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:50,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 19:31:50,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:31:50,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:50,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:31:50,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:31:50,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:31:50,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181652069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:50,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:50,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 10 [2022-03-03 19:31:50,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963766623] [2022-03-03 19:31:50,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:50,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:31:50,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:50,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:31:50,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:31:50,693 INFO L87 Difference]: Start difference. First operand 50768 states and 187242 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:51,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:51,288 INFO L93 Difference]: Finished difference Result 51568 states and 189738 transitions. [2022-03-03 19:31:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:31:51,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:51,474 INFO L225 Difference]: With dead ends: 51568 [2022-03-03 19:31:51,474 INFO L226 Difference]: Without dead ends: 51449 [2022-03-03 19:31:51,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:31:51,474 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 70 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:51,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 188 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:31:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51449 states. [2022-03-03 19:31:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51449 to 51115. [2022-03-03 19:31:52,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51115 states, 51114 states have (on average 3.6864068552647025) internal successors, (188427), 51114 states have internal predecessors, (188427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51115 states to 51115 states and 188427 transitions. [2022-03-03 19:31:52,796 INFO L78 Accepts]: Start accepts. Automaton has 51115 states and 188427 transitions. Word has length 23 [2022-03-03 19:31:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:52,796 INFO L470 AbstractCegarLoop]: Abstraction has 51115 states and 188427 transitions. [2022-03-03 19:31:52,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 51115 states and 188427 transitions. [2022-03-03 19:31:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:52,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:52,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:52,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:53,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:53,068 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:53,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1949809626, now seen corresponding path program 19 times [2022-03-03 19:31:53,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:53,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714199708] [2022-03-03 19:31:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:53,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:53,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:53,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714199708] [2022-03-03 19:31:53,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714199708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:53,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088661933] [2022-03-03 19:31:53,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:31:53,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:53,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:53,127 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:53,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 19:31:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:53,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:31:53,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:31:53,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:31:53,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088661933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:53,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:53,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-03-03 19:31:53,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265589220] [2022-03-03 19:31:53,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:53,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:31:53,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:53,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:31:53,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:31:53,335 INFO L87 Difference]: Start difference. First operand 51115 states and 188427 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:53,909 INFO L93 Difference]: Finished difference Result 51903 states and 190754 transitions. [2022-03-03 19:31:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:31:53,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:54,090 INFO L225 Difference]: With dead ends: 51903 [2022-03-03 19:31:54,090 INFO L226 Difference]: Without dead ends: 51757 [2022-03-03 19:31:54,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:31:54,090 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 50 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:54,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 285 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:31:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51757 states. [2022-03-03 19:31:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51757 to 51285. [2022-03-03 19:31:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51285 states, 51284 states have (on average 3.6865884096404336) internal successors, (189063), 51284 states have internal predecessors, (189063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51285 states to 51285 states and 189063 transitions. [2022-03-03 19:31:55,452 INFO L78 Accepts]: Start accepts. Automaton has 51285 states and 189063 transitions. Word has length 23 [2022-03-03 19:31:55,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:55,452 INFO L470 AbstractCegarLoop]: Abstraction has 51285 states and 189063 transitions. [2022-03-03 19:31:55,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:55,452 INFO L276 IsEmpty]: Start isEmpty. Operand 51285 states and 189063 transitions. [2022-03-03 19:31:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:55,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:55,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:55,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-03 19:31:55,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-03 19:31:55,721 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:55,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1845249086, now seen corresponding path program 20 times [2022-03-03 19:31:55,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:55,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691040363] [2022-03-03 19:31:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:55,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:55,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:55,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691040363] [2022-03-03 19:31:55,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691040363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:55,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616882115] [2022-03-03 19:31:55,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:31:55,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:55,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:55,800 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:55,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 19:31:55,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:31:55,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:55,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:31:55,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:31:55,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:31:56,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616882115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:56,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:56,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-03-03 19:31:56,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804829883] [2022-03-03 19:31:56,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:56,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:31:56,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:31:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:31:56,053 INFO L87 Difference]: Start difference. First operand 51285 states and 189063 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:56,687 INFO L93 Difference]: Finished difference Result 51877 states and 190892 transitions. [2022-03-03 19:31:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:31:56,687 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:56,872 INFO L225 Difference]: With dead ends: 51877 [2022-03-03 19:31:56,872 INFO L226 Difference]: Without dead ends: 51783 [2022-03-03 19:31:56,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:31:56,872 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 77 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:56,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 304 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:31:56,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51783 states. [2022-03-03 19:31:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51783 to 51526. [2022-03-03 19:31:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51526 states, 51525 states have (on average 3.6843085880640465) internal successors, (189834), 51525 states have internal predecessors, (189834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:58,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51526 states to 51526 states and 189834 transitions. [2022-03-03 19:31:58,238 INFO L78 Accepts]: Start accepts. Automaton has 51526 states and 189834 transitions. Word has length 23 [2022-03-03 19:31:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:31:58,238 INFO L470 AbstractCegarLoop]: Abstraction has 51526 states and 189834 transitions. [2022-03-03 19:31:58,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 51526 states and 189834 transitions. [2022-03-03 19:31:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:31:58,307 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:31:58,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:31:58,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-03 19:31:58,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:58,508 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:31:58,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:31:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1982895082, now seen corresponding path program 21 times [2022-03-03 19:31:58,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:31:58,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422328581] [2022-03-03 19:31:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:31:58,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:31:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:31:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:31:58,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:31:58,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422328581] [2022-03-03 19:31:58,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422328581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:31:58,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60213562] [2022-03-03 19:31:58,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:31:58,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:31:58,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:31:58,562 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:31:58,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 19:31:58,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:31:58,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:31:58,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:31:58,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:31:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:31:58,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:31:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:31:58,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60213562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:31:58,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:31:58,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-03-03 19:31:58,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264317707] [2022-03-03 19:31:58,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:31:58,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:31:58,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:31:58,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:31:58,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:31:58,701 INFO L87 Difference]: Start difference. First operand 51526 states and 189834 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:31:59,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:31:59,291 INFO L93 Difference]: Finished difference Result 52407 states and 192327 transitions. [2022-03-03 19:31:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:31:59,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:31:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:31:59,474 INFO L225 Difference]: With dead ends: 52407 [2022-03-03 19:31:59,474 INFO L226 Difference]: Without dead ends: 52346 [2022-03-03 19:31:59,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:31:59,474 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 91 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:31:59,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 262 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:31:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52346 states. [2022-03-03 19:32:00,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52346 to 51817. [2022-03-03 19:32:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51817 states, 51816 states have (on average 3.6825304925119653) internal successors, (190814), 51816 states have internal predecessors, (190814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:00,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51817 states to 51817 states and 190814 transitions. [2022-03-03 19:32:00,842 INFO L78 Accepts]: Start accepts. Automaton has 51817 states and 190814 transitions. Word has length 23 [2022-03-03 19:32:00,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:00,842 INFO L470 AbstractCegarLoop]: Abstraction has 51817 states and 190814 transitions. [2022-03-03 19:32:00,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:00,842 INFO L276 IsEmpty]: Start isEmpty. Operand 51817 states and 190814 transitions. [2022-03-03 19:32:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:32:00,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:00,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:00,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:01,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:01,114 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:01,114 INFO L85 PathProgramCache]: Analyzing trace with hash 759447458, now seen corresponding path program 26 times [2022-03-03 19:32:01,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:01,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448492547] [2022-03-03 19:32:01,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:01,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:01,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:01,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448492547] [2022-03-03 19:32:01,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448492547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:01,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786695305] [2022-03-03 19:32:01,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:32:01,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:01,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:01,147 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:01,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 19:32:01,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:32:01,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:01,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:32:01,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:01,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:01,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786695305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:01,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:01,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2022-03-03 19:32:01,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444185920] [2022-03-03 19:32:01,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:01,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:32:01,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:32:01,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:32:01,311 INFO L87 Difference]: Start difference. First operand 51817 states and 190814 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:02,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:02,957 INFO L93 Difference]: Finished difference Result 149980 states and 550232 transitions. [2022-03-03 19:32:02,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:32:02,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:32:02,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:03,605 INFO L225 Difference]: With dead ends: 149980 [2022-03-03 19:32:03,605 INFO L226 Difference]: Without dead ends: 149950 [2022-03-03 19:32:03,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:32:03,605 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 206 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:03,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 146 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:32:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149950 states. [2022-03-03 19:32:06,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149950 to 74032. [2022-03-03 19:32:06,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74032 states, 74031 states have (on average 3.695762585943726) internal successors, (273601), 74031 states have internal predecessors, (273601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74032 states to 74032 states and 273601 transitions. [2022-03-03 19:32:06,742 INFO L78 Accepts]: Start accepts. Automaton has 74032 states and 273601 transitions. Word has length 23 [2022-03-03 19:32:06,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:06,743 INFO L470 AbstractCegarLoop]: Abstraction has 74032 states and 273601 transitions. [2022-03-03 19:32:06,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 74032 states and 273601 transitions. [2022-03-03 19:32:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:32:07,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:07,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:07,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:07,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-03 19:32:07,339 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:07,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1245251562, now seen corresponding path program 27 times [2022-03-03 19:32:07,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:07,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479218219] [2022-03-03 19:32:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:07,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:07,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:07,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479218219] [2022-03-03 19:32:07,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479218219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:07,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666827385] [2022-03-03 19:32:07,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:32:07,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:07,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:07,373 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:07,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 19:32:07,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:32:07,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:07,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:32:07,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:07,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:07,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666827385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:07,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:07,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2022-03-03 19:32:07,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862448870] [2022-03-03 19:32:07,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:07,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:32:07,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:07,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:32:07,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:32:07,526 INFO L87 Difference]: Start difference. First operand 74032 states and 273601 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:08,920 INFO L93 Difference]: Finished difference Result 158003 states and 582353 transitions. [2022-03-03 19:32:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:32:08,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:32:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:09,872 INFO L225 Difference]: With dead ends: 158003 [2022-03-03 19:32:09,872 INFO L226 Difference]: Without dead ends: 158003 [2022-03-03 19:32:09,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:32:09,872 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 219 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:09,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 62 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:32:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158003 states. [2022-03-03 19:32:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158003 to 98285. [2022-03-03 19:32:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98285 states, 98284 states have (on average 3.7211753693378373) internal successors, (365732), 98284 states have internal predecessors, (365732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98285 states to 98285 states and 365732 transitions. [2022-03-03 19:32:13,139 INFO L78 Accepts]: Start accepts. Automaton has 98285 states and 365732 transitions. Word has length 23 [2022-03-03 19:32:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:13,139 INFO L470 AbstractCegarLoop]: Abstraction has 98285 states and 365732 transitions. [2022-03-03 19:32:13,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:13,139 INFO L276 IsEmpty]: Start isEmpty. Operand 98285 states and 365732 transitions. [2022-03-03 19:32:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:32:13,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:13,604 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:13,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:13,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:13,805 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:13,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1186532844, now seen corresponding path program 22 times [2022-03-03 19:32:13,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:13,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316083829] [2022-03-03 19:32:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:13,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:13,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:13,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316083829] [2022-03-03 19:32:13,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316083829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:13,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399404149] [2022-03-03 19:32:13,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:32:13,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:13,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:13,866 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:13,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 19:32:13,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:32:13,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:13,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:32:13,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:13,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:14,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399404149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:14,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:14,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-03-03 19:32:14,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703198219] [2022-03-03 19:32:14,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:14,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:32:14,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:14,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:32:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:32:14,052 INFO L87 Difference]: Start difference. First operand 98285 states and 365732 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:14,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:14,941 INFO L93 Difference]: Finished difference Result 99056 states and 368040 transitions. [2022-03-03 19:32:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:32:14,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:32:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:15,350 INFO L225 Difference]: With dead ends: 99056 [2022-03-03 19:32:15,351 INFO L226 Difference]: Without dead ends: 98998 [2022-03-03 19:32:15,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:32:15,351 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:15,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 227 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:32:15,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98998 states. [2022-03-03 19:32:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98998 to 98589. [2022-03-03 19:32:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98589 states, 98588 states have (on average 3.7205745121110074) internal successors, (366804), 98588 states have internal predecessors, (366804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98589 states to 98589 states and 366804 transitions. [2022-03-03 19:32:18,209 INFO L78 Accepts]: Start accepts. Automaton has 98589 states and 366804 transitions. Word has length 23 [2022-03-03 19:32:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:18,209 INFO L470 AbstractCegarLoop]: Abstraction has 98589 states and 366804 transitions. [2022-03-03 19:32:18,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 98589 states and 366804 transitions. [2022-03-03 19:32:18,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:32:18,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:18,353 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:18,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-03 19:32:18,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:18,554 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash 786212196, now seen corresponding path program 28 times [2022-03-03 19:32:18,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:18,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367813265] [2022-03-03 19:32:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:18,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:18,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:18,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367813265] [2022-03-03 19:32:18,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367813265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:18,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024132103] [2022-03-03 19:32:18,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:32:18,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:18,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:18,643 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:18,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 19:32:18,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:32:18,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:18,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:32:18,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:18,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:18,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024132103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:18,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:18,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-03 19:32:18,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827373065] [2022-03-03 19:32:18,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:18,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:32:18,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:32:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:32:18,903 INFO L87 Difference]: Start difference. First operand 98589 states and 366804 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:19,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:19,974 INFO L93 Difference]: Finished difference Result 99789 states and 370318 transitions. [2022-03-03 19:32:19,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:32:19,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:32:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:20,599 INFO L225 Difference]: With dead ends: 99789 [2022-03-03 19:32:20,599 INFO L226 Difference]: Without dead ends: 99743 [2022-03-03 19:32:20,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:32:20,599 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 109 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:20,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 490 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:32:20,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99743 states. [2022-03-03 19:32:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99743 to 99080. [2022-03-03 19:32:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99080 states, 99079 states have (on average 3.7192139605769134) internal successors, (368496), 99079 states have internal predecessors, (368496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99080 states to 99080 states and 368496 transitions. [2022-03-03 19:32:23,431 INFO L78 Accepts]: Start accepts. Automaton has 99080 states and 368496 transitions. Word has length 25 [2022-03-03 19:32:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:23,431 INFO L470 AbstractCegarLoop]: Abstraction has 99080 states and 368496 transitions. [2022-03-03 19:32:23,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:23,431 INFO L276 IsEmpty]: Start isEmpty. Operand 99080 states and 368496 transitions. [2022-03-03 19:32:23,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:32:23,592 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:23,592 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:23,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:23,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:23,793 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash -94226864, now seen corresponding path program 29 times [2022-03-03 19:32:23,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:23,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595596599] [2022-03-03 19:32:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:23,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:23,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:23,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595596599] [2022-03-03 19:32:23,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595596599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:23,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895013390] [2022-03-03 19:32:23,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:32:23,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:23,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:23,871 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:23,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 19:32:23,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:32:23,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:23,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:32:23,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:23,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:24,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895013390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:24,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:24,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-03 19:32:24,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266113283] [2022-03-03 19:32:24,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:24,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:32:24,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:24,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:32:24,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:32:24,119 INFO L87 Difference]: Start difference. First operand 99080 states and 368496 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:25,219 INFO L93 Difference]: Finished difference Result 101021 states and 374921 transitions. [2022-03-03 19:32:25,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:32:25,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:32:25,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:25,853 INFO L225 Difference]: With dead ends: 101021 [2022-03-03 19:32:25,854 INFO L226 Difference]: Without dead ends: 100948 [2022-03-03 19:32:25,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:32:25,854 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 99 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:25,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 447 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:32:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100948 states. [2022-03-03 19:32:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100948 to 100006. [2022-03-03 19:32:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100006 states, 100005 states have (on average 3.7180740962951853) internal successors, (371826), 100005 states have internal predecessors, (371826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100006 states to 100006 states and 371826 transitions. [2022-03-03 19:32:28,771 INFO L78 Accepts]: Start accepts. Automaton has 100006 states and 371826 transitions. Word has length 25 [2022-03-03 19:32:28,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:28,771 INFO L470 AbstractCegarLoop]: Abstraction has 100006 states and 371826 transitions. [2022-03-03 19:32:28,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 100006 states and 371826 transitions. [2022-03-03 19:32:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:32:28,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:28,937 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:28,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:29,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-03 19:32:29,138 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:29,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1627658808, now seen corresponding path program 30 times [2022-03-03 19:32:29,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:29,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667841187] [2022-03-03 19:32:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:29,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:29,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:29,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667841187] [2022-03-03 19:32:29,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667841187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:29,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880299148] [2022-03-03 19:32:29,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:32:29,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:29,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:29,202 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:29,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 19:32:29,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:32:29,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:29,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:32:29,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:29,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:29,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880299148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:29,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:29,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2022-03-03 19:32:29,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109320287] [2022-03-03 19:32:29,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:29,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:32:29,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:29,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:32:29,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:32:29,368 INFO L87 Difference]: Start difference. First operand 100006 states and 371826 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:30,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:30,389 INFO L93 Difference]: Finished difference Result 101212 states and 375366 transitions. [2022-03-03 19:32:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:32:30,389 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:32:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:30,808 INFO L225 Difference]: With dead ends: 101212 [2022-03-03 19:32:30,808 INFO L226 Difference]: Without dead ends: 101187 [2022-03-03 19:32:30,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:32:30,808 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 98 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:30,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 456 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:32:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101187 states. [2022-03-03 19:32:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101187 to 100410. [2022-03-03 19:32:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100410 states, 100409 states have (on average 3.7174556065691324) internal successors, (373266), 100409 states have internal predecessors, (373266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100410 states to 100410 states and 373266 transitions. [2022-03-03 19:32:33,968 INFO L78 Accepts]: Start accepts. Automaton has 100410 states and 373266 transitions. Word has length 25 [2022-03-03 19:32:33,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:33,968 INFO L470 AbstractCegarLoop]: Abstraction has 100410 states and 373266 transitions. [2022-03-03 19:32:33,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:33,968 INFO L276 IsEmpty]: Start isEmpty. Operand 100410 states and 373266 transitions. [2022-03-03 19:32:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:32:34,149 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:34,149 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:34,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-03 19:32:34,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:34,349 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:34,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:34,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1624702482, now seen corresponding path program 31 times [2022-03-03 19:32:34,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:34,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236007117] [2022-03-03 19:32:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:34,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:34,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:34,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236007117] [2022-03-03 19:32:34,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236007117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:34,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960416378] [2022-03-03 19:32:34,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:32:34,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:34,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:34,428 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:34,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 19:32:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:34,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:32:34,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:34,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:34,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960416378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:34,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:34,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-03-03 19:32:34,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906959076] [2022-03-03 19:32:34,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:34,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:32:34,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:32:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:32:34,662 INFO L87 Difference]: Start difference. First operand 100410 states and 373266 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:35,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:35,821 INFO L93 Difference]: Finished difference Result 101635 states and 376817 transitions. [2022-03-03 19:32:35,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:32:35,822 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:32:35,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:36,395 INFO L225 Difference]: With dead ends: 101635 [2022-03-03 19:32:36,396 INFO L226 Difference]: Without dead ends: 101562 [2022-03-03 19:32:36,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:32:36,396 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 75 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:36,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 341 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:32:36,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101562 states. [2022-03-03 19:32:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101562 to 100619. [2022-03-03 19:32:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100619 states, 100618 states have (on average 3.7178238486155557) internal successors, (374080), 100618 states have internal predecessors, (374080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100619 states to 100619 states and 374080 transitions. [2022-03-03 19:32:39,390 INFO L78 Accepts]: Start accepts. Automaton has 100619 states and 374080 transitions. Word has length 25 [2022-03-03 19:32:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:39,390 INFO L470 AbstractCegarLoop]: Abstraction has 100619 states and 374080 transitions. [2022-03-03 19:32:39,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 100619 states and 374080 transitions. [2022-03-03 19:32:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:32:39,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:39,544 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:39,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-03 19:32:39,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:39,744 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1401888858, now seen corresponding path program 32 times [2022-03-03 19:32:39,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:39,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674569164] [2022-03-03 19:32:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:32:39,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:39,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674569164] [2022-03-03 19:32:39,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674569164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:39,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917560426] [2022-03-03 19:32:39,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:32:39,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:39,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:39,833 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:39,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 19:32:39,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:32:39,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:39,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:32:39,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:32:39,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:32:40,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917560426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:40,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:40,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-03 19:32:40,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251170205] [2022-03-03 19:32:40,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:40,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:32:40,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:40,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:32:40,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:32:40,098 INFO L87 Difference]: Start difference. First operand 100619 states and 374080 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:41,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:41,156 INFO L93 Difference]: Finished difference Result 102353 states and 379262 transitions. [2022-03-03 19:32:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:32:41,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:32:41,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:41,793 INFO L225 Difference]: With dead ends: 102353 [2022-03-03 19:32:41,793 INFO L226 Difference]: Without dead ends: 102254 [2022-03-03 19:32:41,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:32:41,793 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 88 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:41,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 377 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:32:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102254 states. [2022-03-03 19:32:43,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102254 to 100990. [2022-03-03 19:32:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100990 states, 100989 states have (on average 3.7180088920575507) internal successors, (375478), 100989 states have internal predecessors, (375478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100990 states to 100990 states and 375478 transitions. [2022-03-03 19:32:44,709 INFO L78 Accepts]: Start accepts. Automaton has 100990 states and 375478 transitions. Word has length 25 [2022-03-03 19:32:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:44,710 INFO L470 AbstractCegarLoop]: Abstraction has 100990 states and 375478 transitions. [2022-03-03 19:32:44,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 100990 states and 375478 transitions. [2022-03-03 19:32:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:32:44,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:44,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:44,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-03 19:32:45,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-03 19:32:45,071 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:45,071 INFO L85 PathProgramCache]: Analyzing trace with hash -195414166, now seen corresponding path program 33 times [2022-03-03 19:32:45,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:45,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412278256] [2022-03-03 19:32:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:45,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:45,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:45,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412278256] [2022-03-03 19:32:45,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412278256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:45,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375849628] [2022-03-03 19:32:45,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:32:45,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:45,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:45,145 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:45,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 19:32:45,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:32:45,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:45,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:32:45,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:45,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:45,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375849628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:45,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:45,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-03 19:32:45,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975818247] [2022-03-03 19:32:45,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:45,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:32:45,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:32:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:32:45,403 INFO L87 Difference]: Start difference. First operand 100990 states and 375478 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:46,637 INFO L93 Difference]: Finished difference Result 104802 states and 388036 transitions. [2022-03-03 19:32:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:32:46,637 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:32:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:47,335 INFO L225 Difference]: With dead ends: 104802 [2022-03-03 19:32:47,335 INFO L226 Difference]: Without dead ends: 104702 [2022-03-03 19:32:47,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:32:47,335 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 107 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:47,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 419 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:32:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104702 states. [2022-03-03 19:32:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104702 to 102377. [2022-03-03 19:32:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102377 states, 102376 states have (on average 3.716349535047277) internal successors, (380465), 102376 states have internal predecessors, (380465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:50,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102377 states to 102377 states and 380465 transitions. [2022-03-03 19:32:50,513 INFO L78 Accepts]: Start accepts. Automaton has 102377 states and 380465 transitions. Word has length 25 [2022-03-03 19:32:50,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:32:50,513 INFO L470 AbstractCegarLoop]: Abstraction has 102377 states and 380465 transitions. [2022-03-03 19:32:50,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:50,513 INFO L276 IsEmpty]: Start isEmpty. Operand 102377 states and 380465 transitions. [2022-03-03 19:32:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:32:50,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:32:50,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:32:50,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-03 19:32:50,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:50,877 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:32:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:32:50,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1981712050, now seen corresponding path program 21 times [2022-03-03 19:32:50,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:32:50,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241357045] [2022-03-03 19:32:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:32:50,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:32:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:32:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:50,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:32:50,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241357045] [2022-03-03 19:32:50,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241357045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:32:50,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898189604] [2022-03-03 19:32:50,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:32:50,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:32:50,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:32:50,922 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:32:50,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 19:32:50,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:32:50,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:32:50,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:32:50,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:32:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:51,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:32:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:32:51,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898189604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:32:51,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:32:51,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-03-03 19:32:51,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873389903] [2022-03-03 19:32:51,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:32:51,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:32:51,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:32:51,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:32:51,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:32:51,110 INFO L87 Difference]: Start difference. First operand 102377 states and 380465 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:32:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:32:54,025 INFO L93 Difference]: Finished difference Result 276637 states and 1019556 transitions. [2022-03-03 19:32:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:32:54,025 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:32:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:32:55,721 INFO L225 Difference]: With dead ends: 276637 [2022-03-03 19:32:55,721 INFO L226 Difference]: Without dead ends: 276621 [2022-03-03 19:32:55,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=639, Invalid=1341, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:32:55,722 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 532 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:32:55,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 135 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:32:55,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276621 states. [2022-03-03 19:33:02,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276621 to 204366. [2022-03-03 19:33:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204366 states, 204365 states have (on average 3.7172901426369487) internal successors, (759684), 204365 states have internal predecessors, (759684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204366 states to 204366 states and 759684 transitions. [2022-03-03 19:33:03,835 INFO L78 Accepts]: Start accepts. Automaton has 204366 states and 759684 transitions. Word has length 25 [2022-03-03 19:33:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:03,835 INFO L470 AbstractCegarLoop]: Abstraction has 204366 states and 759684 transitions. [2022-03-03 19:33:03,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 204366 states and 759684 transitions. [2022-03-03 19:33:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:33:04,438 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:04,438 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:04,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:04,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:04,638 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:33:04,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:04,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1495907946, now seen corresponding path program 22 times [2022-03-03 19:33:04,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:04,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109779546] [2022-03-03 19:33:04,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:04,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:04,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:04,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109779546] [2022-03-03 19:33:04,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109779546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:04,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550218340] [2022-03-03 19:33:04,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:33:04,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:04,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:04,681 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:33:04,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 19:33:04,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:33:04,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:04,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:33:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:04,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:04,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550218340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:04,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:04,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-03-03 19:33:04,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253188298] [2022-03-03 19:33:04,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:04,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:33:04,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:04,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:33:04,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:33:04,884 INFO L87 Difference]: Start difference. First operand 204366 states and 759684 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:09,720 INFO L93 Difference]: Finished difference Result 450253 states and 1667299 transitions. [2022-03-03 19:33:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:33:09,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:33:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:13,438 INFO L225 Difference]: With dead ends: 450253 [2022-03-03 19:33:13,439 INFO L226 Difference]: Without dead ends: 450253 [2022-03-03 19:33:13,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:33:13,439 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 250 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:13,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 90 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:33:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450253 states. [2022-03-03 19:33:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450253 to 286637. [2022-03-03 19:33:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286637 states, 286636 states have (on average 3.705075426673551) internal successors, (1062008), 286636 states have internal predecessors, (1062008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286637 states to 286637 states and 1062008 transitions. [2022-03-03 19:33:25,847 INFO L78 Accepts]: Start accepts. Automaton has 286637 states and 1062008 transitions. Word has length 25 [2022-03-03 19:33:25,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:25,848 INFO L470 AbstractCegarLoop]: Abstraction has 286637 states and 1062008 transitions. [2022-03-03 19:33:25,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 286637 states and 1062008 transitions. [2022-03-03 19:33:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:33:26,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:26,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:26,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-03 19:33:26,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:26,656 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:33:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1886312940, now seen corresponding path program 34 times [2022-03-03 19:33:26,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:26,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658397246] [2022-03-03 19:33:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:26,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:26,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:26,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658397246] [2022-03-03 19:33:26,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658397246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:26,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673656455] [2022-03-03 19:33:26,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:33:26,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:26,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:26,749 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:33:26,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 19:33:26,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:33:26,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:26,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:33:26,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:26,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:27,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673656455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:27,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:27,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-03 19:33:27,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338009269] [2022-03-03 19:33:27,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:27,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:33:27,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:27,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:33:27,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:33:27,227 INFO L87 Difference]: Start difference. First operand 286637 states and 1062008 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:32,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:32,018 INFO L93 Difference]: Finished difference Result 291437 states and 1076297 transitions. [2022-03-03 19:33:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-03 19:33:32,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:33:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:33,797 INFO L225 Difference]: With dead ends: 291437 [2022-03-03 19:33:33,797 INFO L226 Difference]: Without dead ends: 290870 [2022-03-03 19:33:33,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1066, Invalid=4786, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:33:33,798 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 312 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:33,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 440 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:33:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290870 states. [2022-03-03 19:33:41,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290870 to 287839. [2022-03-03 19:33:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287839 states, 287838 states have (on average 3.7038473029968246) internal successors, (1066108), 287838 states have internal predecessors, (1066108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287839 states to 287839 states and 1066108 transitions. [2022-03-03 19:33:44,652 INFO L78 Accepts]: Start accepts. Automaton has 287839 states and 1066108 transitions. Word has length 25 [2022-03-03 19:33:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:44,652 INFO L470 AbstractCegarLoop]: Abstraction has 287839 states and 1066108 transitions. [2022-03-03 19:33:44,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 287839 states and 1066108 transitions.